Re: Misfires - '02 JGC Limited...
i do know that many lube shops and mom and pop shops don't stock the "Original" Stuff. many use the Prestone "Any Color" kind or equivelent. they also don't pay close attention to the ratio. the ratio needs to be high enough in Coolant to prevent corrosion.
i dunno anything about chemistry in within this topic. but i would suspect GM and Chrysler have a larger R&D budget than Prestone. and likely more brilliant minds.
Thanks for all your suggestions guys. hopefully this will help others struggling like hell with this issue.
Stock 2002 WJ 4.7