Skip the auto shop - Our mechanics make house calls

Q: My girlfriend accidentally poured about 5 quarts of water into my engine oil and drove the car 30 plus miles home from work

asked by on

My girlfriend accidentally poured 5 quarts of water into my engine oil compartment then drove it about 35 miles home from work.

My car has 294000miles.
My car has a manual transmission.

A: Hi there, thanks for writing in about your ...

Hi there, thanks for writing in about your 1995 Honda Civic. There is an old saying about oil and water mixing - and for internal combustion engines, it typically ends up in broken parts. The extra volume of liquid inside the oil chamber could cause problems if not replaced ASAP; including damage to the combustion chamber, piston rings, cylinder head valves and more. The best option for you at this point is to stop driving the vehicle immediately and have the oil and filter completely drained and changed. When the engine drains, adding new oil and a filter should clear out the excess water, however, it would be a good idea to replace the oil and filter again after about 500 miles to be safe.

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: After alternator is replaced, battery light still comes on

Hello. It is possible that the problems that you have been experiencing with the bad alternators have damaged the battery causing it to be weak. This would make the Battery Light come on. It is also possible that there is...

Q: No oil on dipstick and slightly lower oil pressure

Hello. If you are checking the oil at the dipstick and it is being added to the correct area then you more than likely have a serious internal sludge issue. If there is a lot of sludge then the oil...

Q: While driving my engine stutters and tries to cut out at 4000 rpm.

Hi there. The engine is cutting out for a high back pressure build up in the exhaust system. The catalytic converter or muffler could be plugged up causing the engine to create too much back pressure and when the engine...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
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...