Skip the auto shop - Our mechanics make house calls

Q: Is it bad to over-fill engine oil?

asked by on

Is an over-filled engine oil bad? I've had my Mazda taken to the dealership for fluid replacement and each time I noticed that the oil level was above the second mark.

A: Yes it is bad. Engines are made for a certa...

Yes it is bad. Engines are made for a certain amount of oil. If you put too much oil, it takes up space that wasn't taken up before and can cause compression problems that can blow seals out.

You'd want to empty it out so that it's just at the full level and go someplace else to get your oil changed, because will need to be at the full level. That's what a pro does. I always look them up. I don't even trust a gas sign. I look at my computer and if it says 3.4 quarts, I put 3.4 quarts. You want to be a pro when you're changing it and not put the wrong amount in because it can ruin it.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Water pump needs replacing

Hello, a coolant leak should be repaired sooner than later to avoid engine damage. To check for leaks, the cooling system needs to be pressurized and inspected. If the coolant pump is found to be leaking then it will need...

Q: Belt makes noise after turning on air conditioning

Hi. If your vehicle is only making noise when you start the vehicle, it may be possible that there is a problem with the belt or one or more of the pulleys. I would recommend having a professional technician, such...

Q: Stripped screws on seal - 1998 Volvo S90

Hello. Any oil leak can become a really serious issue. It can remain a small, and smelly nuisance, or it can cause a fire. You need to fix it as soon as possible. The easiest and fastest way to repair...

Related articles

How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...