Originally Posted By: Gearhead
Can Zerex G-05 be used in my 95 F150 4.9L six? Currently it has a 'long life' coolant the prior owner had installed (orange color).
I've flushed systems before, but am concerned with gasket & cooling system component compatibility.
Thanks
If you don't know EXACTLY what the "orange" stuff is, I would get it out ASAP. If its DexCool or anything else with 2EHA as part of the chemistry, it will attack certain gasket materials.
G-05 is probably the most universally compatible of all modern coolants and should be fine. If you can find a good conventional silicate antifreeze (Zerex MaxLife is an example) then that would be the "by the book" solution. If it were mine, I'd use G-05.