andradesautomotiveservice

Did You Put the Wrong Oil in Your Car? Here’s What You Should Know

Mon, 31 Aug 2026 06:39:49 GMT

Putting the wrong oil in an engine doesn't always cause immediate damage, but it is not something to ignore. The important questions are what oil went in, what the engine actually requires, how far the vehicle has been driven, and whether the oil is simply a different viscosity or completely the wrong specification.

We see this happen after quick oil changes, DIY service, or when someone grabs the wrong bottle from the garage. The right response is usually straightforward once we know exactly what was installed. What you do not want is to keep driving for weeks without checking.

Start With the Viscosity on the Oil Cap or Manual

Most drivers first notice the problem when they see a viscosity such as 5W-30 on the receipt even though the oil cap calls for 0W-20.

A small difference does not automatically mean the engine has been harmed, but modern engines are designed around specific oil flow and pressure characteristics. The viscosity affects how quickly oil circulates during startup and how well it maintains a protective film once the engine is hot.

If the wrong viscosity was just installed and the vehicle has barely been driven, changing it to the correct oil is the cleanest solution. There is little reason to leave questionable oil in the engine and hope it behaves the same.

The Oil Specification Is Just as Important as the Weight

Two oils can both say 5W-30 and still not meet the same requirements.

Manufacturers specify performance standards based on engine design, emissions equipment, turbocharging, fuel economy systems, and internal wear protection. European vehicles, in particular, can require very specific approvals that go well beyond the viscosity printed on the front of the bottle.

At our shop, we verify both the viscosity and the required specification. Looking only at the weight is not enough. An oil that doesn't meet the engine's required approval can create deposits, wear, or emissions-system problems over time, even if the viscosity number looks correct.

Driving a Short Distance Is Different From Driving Thousands of Miles

If you realize the mistake immediately after an oil change, there is usually no reason to panic. Shut the engine off when practical, confirm what was used, and correct it.

If the car has already been driven for several thousand miles, we want to know more. A slightly different approved viscosity is one situation. Using oil that is far too thick, far too thin, or missing an important manufacturer specification is another.

We also pay attention to how the engine behaves. New ticking, oil-pressure warnings, increased oil consumption, unusual smoke, or a change in engine noise deserve a closer inspection rather than assuming the oil is the only issue.

Oil That Is Too Thick Can Slow Flow at Startup

Thicker oil resists flow more than thinner oil, especially when the engine is cold. If the engine was designed for a lighter viscosity, going significantly thicker can delay oil reaching small passages and upper-engine components after startup.

Modern variable valve timing systems and timing-chain tensioners depend on controlled oil pressure. Some turbochargers also rely on quick oil flow through narrow passages.

A slightly thicker oil does not guarantee a problem, but there is no advantage in deliberately ignoring the factory requirement. Using the correct viscosity keeps the lubrication system operating the way it was engineered to work.

Oil That Is Too Thin Can Reduce Protection When Hot

Oil that is substantially thinner than specified creates the opposite concern. Once the engine reaches operating temperature, the oil film between loaded parts can be thinner than the engine was designed around.

That becomes more important under heavy acceleration, towing, high temperatures, or extended highway use. Bearings, camshafts, and other loaded surfaces depend on the oil maintaining enough film strength to keep metal parts separated.

If a thinner oil was installed by mistake, we normally recommend correcting it rather than waiting for the next service interval. The cost of another oil change is small compared with the risk of engine wear.

Do Not Add Random Oil to Fix the Problem

One of the worst reactions is trying to correct the wrong oil by pouring in another viscosity.

Adding thick oil to thin oil does not turn the mixture into a precisely controlled in-between grade. It can also overfill the crankcase, which creates a completely separate problem.

The same goes for additives. We do not recommend pouring in viscosity boosters or other treatments to compensate for an incorrect oil change. Drain the incorrect oil, replace the filter when appropriate, and refill the engine with the correct product.

That is a much cleaner repair than creating a mixture nobody can accurately identify afterward.

Watch for Oil Pressure or Engine Noise Warnings

If the oil-pressure warning comes on after an oil change, shut the engine off and have it checked. Do not keep driving just because the oil level looks full.

A warning can come from incorrect oil level, the wrong filter, a leak, an oil-pressure problem, or another service issue. Heavy ticking, knocking, or rattling immediately after an oil change also deserves attention.

Regular maintenance works best when you follow the exact oil requirements every time . Keeping receipts or service records also makes it easier to confirm what was installed if a question comes up later.

Get Engine Oil Service In Fall River, MA, With Andrade's Automotive Service

If you think the wrong oil was installed in your vehicle, Andrade's Automotive Service in Fall River, MA, can verify the required viscosity and specification, check the oil level, and correct the service before it becomes a bigger concern.

Schedule an oil service and get the engine back on the lubricant it was designed to use.

Why Your Car Struggles To Start Even With a Good Battery

Fri, 31 Jul 2026 16:00:37 GMT

A strong battery is only one part of the starting system. When the engine cranks slowly, takes several attempts to fire, or starts inconsistently, the battery may test well while another component prevents the engine from starting as expected.

The starting system depends on electrical connections, the starter motor, fuel delivery, ignition, engine sensors, and mechanical condition. The sound the vehicle makes during the problem often provides an important clue, but proper testing is needed before replacing parts.

The Starter Motor May Be Wearing Out

The starter motor uses battery power to turn the engine until combustion begins. Internal contacts, brushes, bearings, and windings can wear with age. A failing starter may work normally one day and respond slowly or not at all the next.

Common signs include a single click, intermittent cranking, grinding, or a starter that turns more slowly when the engine is hot. A good battery can still be unable to overcome excessive resistance inside a worn starter. Voltage and current testing can show whether the motor is receiving proper power and using it correctly.

Loose Or Corroded Connections Can Restrict Power

Battery cables and ground connections must carry high current during cranking. Corrosion, loose terminals, damaged cables, or a weak engine ground can reduce the power reaching the starter even when the battery itself is fully charged.

The exterior of a cable may look acceptable while corrosion develops beneath the insulation or inside the terminal. Technicians can perform a voltage-drop test while the engine is cranking to find resistance in the positive cable, ground path, terminals, or connections. Cleaning or replacing the affected part may restore normal starting without installing another battery.

The Engine May Not Be Getting Enough Fuel

An engine needs the correct amount of fuel at the proper pressure to start. A weak fuel pump, restricted filter, failing relay, leaking injector, or pressure regulator concern may cause extended cranking before the engine fires.

Fuel pressure can also bleed down after the vehicle sits. The driver may need to crank several times in the morning but experience easier starts during the rest of the day. Testing pressure during cranking and watching how quickly it drops after shutdown can help locate the source.

Possible fuel-related symptoms include:
Long cranking after the vehicle sits overnight
Starting improves after cycling the key several times
The engine starts and stalls immediately
Reduced power during acceleration
A whining sound from the fuel tank
A fuel odor after repeated starting attempts

Fuel delivery problems should be tested rather than diagnosed from symptoms alone. Ignition faults and sensor concerns can create nearly identical behavior.

Ignition Problems Can Delay Combustion

Gasoline engines require a strong spark at the correct time. Worn spark plugs, failing ignition coils, damaged wiring, or moisture around ignition components can make starting difficult, particularly in cold or damp conditions.

The engine may crank at normal speed but shake, stumble, or require several attempts before it stays running. Misfire codes may be stored, although a warning light does not always appear immediately. Checking spark plug condition, ignition output, and related wiring can reveal whether the engine is receiving dependable ignition during startup.

A Faulty Sensor Can Send Incorrect Information

The engine computer relies on several sensors to determine fuel delivery and ignition timing. A failing crankshaft or camshaft position sensor may prevent the computer from recognizing engine rotation. In that situation, the starter can crank normally while the engine refuses to fire.

Coolant temperature, airflow, and throttle sensors can also affect starting. An incorrect temperature signal may cause the computer to deliver too much or too little fuel. Reviewing live data during an inspection helps technicians identify readings that do not match actual engine conditions.

The Security System May Be Blocking The Start

Many vehicles use an immobilizer that recognizes a coded key or electronic fob. If the system cannot verify the key, it may disable the starter, fuel injectors, or ignition system. The result can be a clicking sound, normal cranking without combustion, or an engine that starts and immediately shuts off.

A flashing security indicator on the dashboard is an important clue. The problem may involve the key, fob battery, antenna around the ignition switch, wiring, or security module. Trying a spare programmed key can provide useful information, but diagnostic equipment may be required to confirm the fault.

Mechanical Engine Problems Can Cause Hard Starting

An engine must build enough compression to ignite the air and fuel mixture. Worn piston rings, valve trouble, incorrect valve timing, or a damaged timing belt or chain can reduce compression and make starting difficult.

The starter may sound faster or less even than usual because one or more cylinders are not creating normal resistance. Compression and cylinder leak testing can help determine whether the concern is mechanical. Fresh spark plugs or another battery will not correct low compression or incorrect engine timing.

What The Starting Sound Can Tell You

Pay attention to what happens when you turn the key or press the start button. The exact response can help narrow the testing process.

A single click may point toward the starter, relay, cable, or connection.
Rapid clicking often indicates low available voltage or high resistance.
Normal cranking without starting suggests fuel, ignition, sensor, security, or compression trouble.
Slow cranking may involve the starter, cables, oil viscosity, or engine resistance .
Grinding can indicate starter drive or flywheel damage.
Complete silence may involve the switch, relay, interlock, wiring, or security system.

These clues are useful, but they are not a final diagnosis. Several faults can produce the same sound, especially when electrical resistance changes with temperature.

How Technicians Diagnose A Starting Problem

Diagnosis often begins with battery testing even when the battery is believed to be good. The technician then checks terminals, cable voltage drop, starter current, charging performance, fault codes, and live sensor information.

Fuel pressure, spark, injector operation, and compression may be tested depending on how the engine responds. Regular maintenance records can also reveal overdue spark plugs, fuel system concerns, or previous electrical repairs . Following the starting sequence step by step helps identify the failed area without replacing unrelated components.

Get Starting System Diagnostic In Fall River, MA, With Andrade's Automotive Service

If your car cranks slowly, needs several attempts to start, or refuses to fire despite having a good battery, Andrade's Automotive Service in Fall River, MA, can test the starter, cables, fuel system, ignition components, sensors, and engine condition.

Does Tire Rotation Really Make Tires Last Longer?

Tue, 30 Jun 2026 11:17:25 GMT

Tire rotation sounds like a small service, so it is easy to question how much it really helps. The tires are already on the car, they all touch the same road, and moving them from one position to another may not seem like it would change much.

In reality, tires do not wear evenly in every position. Front tires, rear tires, drive tires, and turning tires all deal with different forces. Rotation helps spread that wear more evenly across the full set, which can help tires last longer and keep the vehicle feeling more stable as the miles add up.

Why Tires Wear Differently

Each tire has a different job depending on where it sits on the vehicle. On many cars, the front tires handle most of the steering and a large share of the braking force. That means the front tires often wear faster on the edges and shoulders.

On front-wheel-drive vehicles, the front tires also handle engine power. They steer, pull the vehicle, and do most of the braking. That is a lot of work for one pair of tires. On rear-wheel-drive vehicles, the rear tires may wear faster from acceleration. All-wheel-drive vehicles can wear tires differently depending on the system, driving habits, and tire condition.

Rotation Helps Even Out Tread Wear

Tire rotation moves tires to different positions so the wear is shared more evenly. A tire that has been working hard on the front may move to the rear. A rear tire may move forward. The exact pattern depends on the vehicle, tire type, tread direction, and drivetrain.

When rotation is done on schedule, the tires tend to stay closer in tread depth. That helps the set age together instead of having two tires wear out much earlier than the others. It can also help reduce uneven wear patterns before they become permanent.

Rotation will not fix a tire that is already badly worn. It works best as preventive care, not a rescue service after the tread has already been damaged.

Skipping Rotation Can Cost You Tires Early

If tires stay in the same position too long, the hard-working pair may wear out first. That can leave you replacing two tires while the other two still have usable tread. In some cases, uneven tread depth can also affect traction, braking, and how the vehicle handles in wet weather.

On some all-wheel-drive vehicles, mismatched tread depth can create stress on drivetrain components. These systems often require tires of a similar size so the vehicle can manage power correctly. Rotation helps reduce the chance that one tire or axle will wear far faster than the others.

A rotation is much cheaper than replacing tires early. It also gives the shop a chance to spot tire problems before they become roadside problems.

How Often Should Tires Be Rotated?

Many vehicles do well with tire rotation around every 5,000 to 7,500 miles, but the right interval depends on the vehicle, tire type, driving conditions, and manufacturer guidance. A common habit is to rotate tires with oil changes when the timing lines up.

Drivers who take short trips, drive in city traffic, carry heavy loads, or deal with rough roads may need closer attention. Performance tires, directional tires, staggered wheel setups, and some specialty tires may have different rotation limits. Not every vehicle uses the same pattern.

The best plan is to follow the vehicle and tire recommendations, then adjust if the tread shows uneven wear.

Rotation Also Reveals Other Problems

A tire rotation is not only about moving tires around. It is also a useful time to look at tread depth, wear patterns, sidewall condition, air pressure, wheel damage, and signs of suspension or alignment trouble.

During a tire inspection, uneven wear can point toward problems such as:

Low tire pressure
Poor alignment
Worn shocks or struts
Loose steering parts
Worn suspension bushings
Bent wheels
Brake drag
Tire balance issues

These problems can ruin tires even if they are rotated on time. If the cause is not corrected, the same wear pattern may keep coming back.

Tire Rotations Cannot Replace Wheel Alignment And Tire Balance

Tire rotation, wheel alignment, and tire balancing are different services. Rotation changes tire positions. Alignment adjusts wheel angles. Balancing corrects how the tire and wheel spin .

If the vehicle pulls, the steering wheel is crooked, or the tires are wearing on one edge, alignment may be needed. If the vehicle shakes at certain speeds, balance may be the issue. Rotation can help even out normal wear, but it cannot correct worn parts, bent wheels, or bad alignment angles.

That is why tire care should be looked at as a system. Rotation helps, but it works best when air pressure, alignment, balance, and suspension condition are also kept in check through regular maintenance.

The Spare Tire May Or May Not Be Included

Some vehicles have a full-size spare that can be included in the rotation pattern. Others have a temporary spare that should not be rotated in. Some vehicles have different front and rear tire sizes, which can limit where tires can be moved.

If the spare is full-size and matches the other tires, it may help spread wear across five tires instead of four. But the tire type, age, tread depth, and wheel match all need to be confirmed first. A spare that is old, cracked, or a different size should not be treated like a normal tire.

Get Tire Rotation In Fall River, MA, With Andrade's Automotive Service

If your tires are wearing unevenly, your vehicle is due for tire rotation, or you want to get more life from your current set, Andrade's Automotive Service in Fall River, MA, can check tire condition and rotate them correctly for your vehicle.

For tire rotation and tire care that helps protect your tread, contact us to schedule an appointment .

5 Check Engine Light Mysteries An Engine Diagnostic Can Solve Fast

Sat, 30 May 2026 06:12:11 GMT

A check engine light can feel like a riddle with bad timing. The car may run fine, idle normally, and still get you across town without a strange noise. Then the light stays on, and nobody wants to hear that it could be one of many things.

That is the frustrating part.

The light does not tell you the full story from the driver’s seat. It only tells you the vehicle’s computer has found something outside its normal range. An engine diagnostic helps turn that warning into a clearer answer before the problem grows or the wrong part gets replaced.

1. Why The Light Came On When The Car Feels Fine

One of the most common check engine light mysteries is a warning with no obvious symptoms. The vehicle starts, accelerates, shifts, and stops normally. Nothing feels urgent, so it is tempting to ignore the light.

Modern vehicles can catch small issues before drivers feel them. A slow oxygen sensor, small EVAP leak, thermostat issue, fuel trim problem, or minor misfire may not change how the car drives right away.

An engine diagnostic can read the stored codes, review live data, and check the system that reported the fault. The code is only the starting point. Testing shows whether the issue is truly small or the first sign of something that could become more expensive later.

2. Whether A Loose Gas Cap Is Really The Cause

A loose gas cap can trigger a check engine light, but it should not become the answer to every warning. The fuel vapor system is sealed, and if the cap does not seal properly, the vehicle may detect an EVAP leak.

If the light came on shortly after fueling, checking the cap is a reasonable first step. Tighten it and drive normally. The light may take several trips to turn off because the vehicle has to run its self-test again.

If the warning stays on, the leak may be somewhere else. EVAP hoses, purge valves, vent valves, fuel tank seals, and charcoal canisters can all cause similar codes. A diagnostic test can help identify the actual leak rather than blaming the cap too quickly.

3. Why The Engine Runs Rough Only Sometimes

Intermittent rough running can be hard to explain. The engine may stumble in the morning, hesitate on the highway, or shake only after it warms up. By the time the vehicle reaches the shop, it may act normal again.

That does not mean the problem disappeared.

A diagnostic can look at misfire counts, fuel trim data, sensor readings, freeze-frame information, and stored history. That information can show what was happening when the fault appeared, even if the symptom is not active during the visit.

Possible causes include worn spark plugs, weak ignition coils, injector problems, vacuum leaks, fuel pressure issues, wiring faults, or low compression. The symptom may feel random, but the computer data often gives the technician a trail to follow.

4. Whether The Oxygen Sensor Is Bad Or Just Reporting Another Problem

Oxygen sensor codes are common, but they can be misunderstood. An oxygen sensor measures exhaust oxygen so the computer can adjust the air-to-fuel ratio. If the reading is slow, stuck, or out of range, the check engine light can turn on.

That does not always mean the sensor is the failed part. It may be reacting to another issue.

An exhaust leak, vacuum leak, misfire, dirty mass airflow sensor, fuel pressure problem, or rich-running engine can all affect oxygen sensor readings . Replacing the sensor without checking the cause can lead to the same light coming back on.

A proper inspection looks at fuel trims, exhaust leaks, wiring, sensor response, and engine behavior. That helps distinguish a failed sensor from one reporting a real mixture problem.

5. Why The Light Is Flashing Instead Of Staying Steady

A flashing check engine light is more serious than a steady one. It often means the engine is actively misfiring, and unburned fuel may be entering the exhaust.

That fuel can overheat and damage the catalytic converter. A converter repair is usually much more expensive than many common misfire repairs, which is why a flashing light should not be ignored.

If the light flashes, avoid hard acceleration and get the vehicle checked quickly. If the engine is shaking badly, losing power, or smelling like fuel, stop driving when it is safe. A diagnostic can identify which cylinder or system is involved and help confirm whether the cause is spark, fuel, air, compression, or wiring.

Why Clearing The Code Is Not A Fix

Clearing a check engine light may make the dashboard look normal for a short time, but it does not repair anything . It can also erase useful information that the technician needs.

Freeze-frame data may show engine temperature, speed, load, fuel trim, and conditions present when the fault happened. That information can save time during testing.

Regular maintenance helps prevent some check engine light issues, especially when spark plugs, filters, fluids, and small leaks are handled on time . Once the light is on, the best step is to find the cause rather than hide the warning.

Get Engine Diagnostic Service In Fall River, MA, With Andrade's Automotive Service

If your check engine light is steady, flashing, or keeps coming back after being cleared, Andrade's Automotive Service in Fall River, MA, can read the codes, review live data, and test the systems behind the warning.

Schedule a visit and get the mystery solved before a small check engine light concern turns into a larger repair .