Skip the auto shop - Our mechanics make house calls

Q: Oil Loss

asked by on

I recently did an oil change on my 4.6L Ford f-150. I put 5.7L of 5w20 vavloine oil in. I drove for probably 30mins and there was no more oil in it. The oil filter is tight and the drain plug is tight, with no sign of oil on the out side of the engine. Im wondering where the oil could of went. My best guess is in the bell housing, but am weary of separating the engine and tranny.

My car has 75400 miles.
My car has an automatic transmission.

A: If you lost all the oil in your engine afte...

If you lost all the oil in your engine after driving for 30 minutes, without any signs of an oil leak, then you need to put in oil until it is full to see how much oil was used.

If you put in more than a quart of oil then you should look at the bell housing for any evidence of oil leaking from it. If there is no leak from the rear main seal then check the exhaust for oil residue.

If the exhaust checks out then you need to have the crankcase ventilation system (PCV) checked for blockage. The PCV valve may cause oil to be ingested into the engine if the system is clogged. If the system is clear and free and working as it should then you have engine piston problems or valve seal problems sucking oil into the engine.

I’d suggest you get your car inspected by a certified mechanic who can perform these checks to accurately diagnose your oil loss. Good luck.

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

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 stuck in park.

I have come across this often on your the Aviator. In some cases the shift cable comes loose from the transmission, but most of the time it is because the shift cable broke. The cable goes from the shifter, through...

Q: Coolant leak despite water pump replacement

It sounds like you have already pinpointed the leak. I suggest having your radiator hose replaced as soon as possible since coolant loss can lead to engine overheating and extensive damage. A technician from your YourMechanic can easily do this...

Q: I took my throttle body off to clean it now my car is idling/revving real hi even in park what should i do to fix it

Hi There, As you may know, after cleaning the throttle body your car needs to go through a "re-learning" process to bring the idle back down. Try doing the following which should bring the idle back down to a normal...

Related articles

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...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.