Skip the auto shop - Our mechanics make house calls

Q: Engine sludge?

asked by on

Hi, I have no oil on dipstick, I changed oil plenty came out. Added recommended 6 qtrs checked dipstick over course of 24 hours dipstick still dry. I added oil to correct spot and on level ground I did not change oil filter. Little bit of sludge on tip of dipstick. What can I do to avoid engine rebuild? My oil pressure is between w0 and 40 between idle and driving not overheating

My car has 173000 miles.
My car has an automatic transmission.

A: If you have excessive sludge in the engine,...

If you have excessive sludge in the engine, then the oil that you pour into the engine may not be able to drain down into the oil pan. You should change the oil and filter using 6 quarts of 0w30 oil and run the engine for about 1000 miles and change the oil doing this several times until you remove most of the sludge build up in the engine and then continue doing the oil and filter changes every 3,000 to 5,000 miles. If the engine has sludge built up to be solid, then the engine would need to be replaced or overhauled to remove the sludge.

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: I have the abs light on and know it was one of the sensors bad. I pulle dthe fuse to the ABS so it wouldn't affect when my daughte

Hi there: I would strongly recommend that you reinsert the fuse that operates the ABS control module. A warning light typically indicates that a sensor is faulty, however, removing power from the module will disable the system; designed and mandated...

Q: Thinking about motor swap

The main problem in such a swap is the engine computers for the two engines you are referring to are not interchangeable. And, you cannot flash re-program your existing computer to work with the new engine because the two use...

Q: Car did not accelerate. Stopped on me while getting onto highway. No fumes a d no leaks that I can see or tell of.

If the car fails to accelerate or is stalling there is something wrong with the fuel or ignition systems and possibly the air induction system. Only an in-person diagnostic will reveal the cause(s). Possibilities that I would initially consider are...

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...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...