I didn't notice a MPG gain either, but it definately quieted the engine down which pretty much tells me that it's being better protected.

It's got to be more than just a coincedence that more and more guy's are replacing their VP44's due to this new ULSD.I think it's because of the loss of lubricity, and that's why I add the 1oz per gallon. I've been doing it for probably a year now.

 

i am havin probs with my vp44 now i think...i gotta make a new post on it