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Old 01-28-2010, 12:01 PM   #1
02yukondoit
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marvel mystery oil

i've been hearing about putting MMO in the engine oil to cure piston slap or lifter noise. does this really work? if so, how much to add, and how long to run it, or add it? my 02 yukon xl has about 82,000 miles and has a tick or knock at start up, this seems to be very common. i was going to add Lucas Oil Stabilazer at the next oil change, or should i go with MMO? also MMO in the gas tank... improved MPG...really? any body out there use it before? i have seen some posts about this but nothing recent, any info would be helpful. thanks.
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Old 01-28-2010, 03:45 PM   #2
bigjim6886
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Re: marvel mystery oil

Hey I have used the lucas for a long time and happy with it. I got 210000 miles out of the last motor. It made the lifters quiet down also. Thats just my thoughts. Good luck
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Old 02-06-2010, 11:46 PM   #3
JL KINGw7
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Re: marvel mystery oil

yea im more of a lucas person but have used the mmo i used 1oz to a qt of oil in two or three hunder miles changed the oil help sum but noise came back not sure about the gas thing...so i tried "SEA FOAM" alittle pricey but works great. good in gas oil or both i used it two weeks ago and it stopped the lifter noise in my 94 yukon sport. 159xxxmi..
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