Engine Knocking after Oil Change
Winching
Joined: Jun 2009
Posts: 692
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And yes, somewhere on the forum there are lots of people who fill their crank case with ATF, idle for 15-20 min, then do a complete oil change.
I'm not sure where they got this advice, but I do not understand why in the hell anyone would not question such a thing, ATF is not a lubricating oil.
But people do it.
I'm not sure where they got this advice, but I do not understand why in the hell anyone would not question such a thing, ATF is not a lubricating oil.
But people do it.
And, no, ATF _is_ a lubricating oil. But it's too thin to fill the entire crank case with.
I understand needing to clean out a engine, especially one that you do not know the history of and that is why I say to use diesel oil, it has a very high detergent package and it will clean the engine slowly as you drive.
Full synthetics also have a high detergent package but they cost twice as much.
Full synthetics also have a high detergent package but they cost twice as much.
If you've been doing this ever/every other/every few oil changes (whether it's adding ATF, diesel, MMO, seafoam, whatever and idling for 15 minutes before draining) it is gong to keep the sludge down. If you do this to an abused motor.....and if you don't know the history it just might be.....you run the very real risk of clogging oil passages from dislodging large pieces of sludge or carbon that make their way to someplace they can't fit.
Those are exactly the situations where you want to run better oil with a good detergent package and do several short duration oil changes.
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