Skip the auto shop - Our mechanics make house calls

Q: Gasoline smell from engine oil

asked by on

There is a gasoline smell in my engine oil that I noticed through the dipstick. No warning lights have appeared, no fuel mileage loss, no hesitation, no exhaust. What could be causing this?

A: Hello. The most common cause of the problem...

Hello. The most common cause of the problem you are having is when engine oil blows up in one of the engine cylinders. What may be happening is that the engine cylinder pistons aren’t sealing properly due to wear and tear. When the engine cylinder pistons don’t seal properly, some of the gas that’s involved in the combustion process in your engine is able to leak past the pistons and get into the oil. This tends to worsen over time so eventually, you may have to rebuild or replace the engine. I suggest having a professional mechanic inspect your engine as soon as possible. A certified mobile mechanic from YourMechanic can provide this inspection at your home or office.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: Car vibrates over 50 MPH

I recommend having your tire balance checked, and your front end suspension inspected for any loose components. YourMechanic can send a mechanic out to the location of your Accord for a diagnostic inspection of your car's vibration issue, and recommend...

Q: Cooling fan staying on after washing engine

Hello. Water may have gotten into a relay or the fuse box, which could be causing the fan to run or not work properly. I would suggest that you have a certified technician, like one from YourMechanic, inspect the cooling...

Q: Car is shaking violently

Hello there. Service Engine Light flashes is an indicator that there is a multiple cylinder misfire taking place. A misfire can easily cause poor acceleration and vehicle shakes. Common causes of misfires are faulty ignition modules, cracked manifolds, or aged...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...