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Discussion Starter · #1 ·
this question i think was lost in an earlier thread....please pardon my ignorance....here it goes

What negative effects would adding a 1/2 quart of Marvel Mystery Oil to my car- just had an oil change 3 weeks ago? (dipstick shows reads full-clean oil)

thank you gentlemen of the mx6 board.....you all are a great resource for us mechanically-challenged!
 
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Get yourself a 17mm wrench, crawl under your car loosen the oil plug until you can turn it with your fingers. Slide an oil pan under and pull the plug out. Drain what looks like a quart and then push the plug back in the hole, one half turn should be enough to stop the flow. Your hand is going to get some oil on it, but hey, no mess no progress (I think I just made that up).

I've done it many a time back in my old lubey days.

If you overfill your crankcase the extra pressure put in the engine can cause rings/valve stem seals, or your pcv valve to go bad.
 

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Yeah, you would much rather get a little dirty and drain the oil rather than over fill your engine. From what I read/hear overfilling your engine is never a good idea. You really don't even need to remove the plug all of the way, you could just leave it really loose let it drip out for a while and wait. Good things come to those who wait. It's slow but it works.
 

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Discussion Starter · #4 ·
Thanks guys.....

I guess I have a little project for the weekend scheduled.....now to pick up some jack stands/ramps and a plastic bucket!!!!

I love this!!!

Thanks again guys!!!!!!
 

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Like everyone else says, overfilling your engine is bad, because it will cause damage to the things stated above but it could also place too much pressure on the crankcase seals and cause them to either start to seep or blow out all together.

methman
 

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The other cool thng that happens on some engines is the oil gets whipped up to a fluff that doesn't lube the engine because it is mostly air. This also can cause a fire as the whipped oil like to seap out of every possible opening.

~Chris

Actually saw this on a K-car (plymoth reliant even)
 
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imagoonmx6 said:

Actually saw this on a K-car (plymoth reliant even)
Seeing as I drive a Horizon as my daily work beater, I will have to testify that K Car's oil seals work in reverse, leaking out more oil than they keep in, at all times, regardless of crankcase pressure :)

I think Chrysler had bought shares in the oil companys in the late '80's :)
 
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