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Discussion Starter #1
I know you guys are gonna' make fun of me, but I changed my diff oil this morning. I put half a jar (about 7 ounces) of STP in along with Royal Purple 75 W 90. The plug had no metal on it....just a small amount of black residue.
I had a whine at 40 MPH and again at 68 -72.

In a word.....

GONE ! ! !

Maybe the diff will fall out of the car on the way to the airport this afternoon, but for know, I'm impressed.

I will post again after a couple hundred miles.

BTW, I contacted STP and they emailed an answer within 24 hours, saying the stuff is compatible with synthetic oil....

Later........
 

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I put some stuff marketed as "Cheetah Sauce" in mine with instant success,....I'm not sure what part of the Cheetah it comes from ,....or how thay go about extracting it,....but the Cheetahs sure seem eager to supply it (hmmmmmm)
 
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