Skip the auto shop - Our mechanics make house calls

Q: Put water in engine oil about 11 hrs ago, ran car for about 40 miles altogether and im getting an oil change now?

asked by on

Water in engine oil about 11 hrs ago ran car for about 40 miles altogether and i am getting an oil change now?

My car has 134321 miles.
My car has an automatic transmission.

Water into the engine oil, whether by accident or with a purpose is not recommended. Your engine relies on oil to lubricate all the moving internal parts. Water will reduce the oil’s lubricating properties,, create foaming as oil and water don’t mix, clog the oil filter, effect oil pressure in a negative manner, and quite probably leave some lasting damage to bearings, crank and cam shafts,etc. Driving 40 miles with water in the oil is honestly, 40 miles too many. Drain that oil and water mix out of there immediately along with a replacement oil filter. Run the engine for a short while, then repeat the oil change process. I cannot say whether lasting damage has definitely occurred or not.

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!
  • Home
  • Questions
  • Put water in engine oil about 11 hrs ago, ran car for about 40 miles altogether and im getting an oil change now?

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: No heat - 1998 Ford Ranger

This may be due to a faulty heater blower motor or potentially a bad heater core. As you may know, the heater core is a small radiator like unit that circulates the hot coolant from the engine through the heater...

Q: 96 Ford Taurus while driving on freeway the car shut down it was out of water and got too hot . is there reset button.

I guess we all have wished for a reset button at some time or another. But no such luck, what's done is done. If the car actually overheated and was driven until it stopped, there has probably been serious engine...

Q: Odometer reset after starting the car normally

This sounds like a processing error in the instrument cluster. The old information is probably lost, and the best way to prevent this in the future would be to have the instrument cluster replaced. You may be able to find...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...