Are there rating on synthetic oils? I saw some Pennoil full synthetic for $2.50 per quart, but in reading the samll print, it recommends changing the oil every 3,000 miles. Synthetic but poor additives? I generally think you get what you pay for or get less than what you pay for. Almost never more than what you pay for.

hmm seems kinda low i pay 4.50 or so for 1 qrt of mobil 1 full synthetic motor oil and i change it every 6k, u shure that the penzoil was not just part synthetic?

yeah it dosent sound full synthetic for 2.50

$6 for Amsoil. Look at the studys Bill99GXE did, they are very impressive.

Mobil 1, Amsoil and Red Line are true synthetic base oils and cost much more to produce than the modified crude legally called "synthetic" oils from Pennzoil, Castrol, Quaker State and Valvoline. You do get what you pay for in this case (or less when the prices are close).

Dave

The bottle write full synthetic. No small print of not including carriers as with some others. The Mobile 1 is only $2.95 per quart. was thinking of using 10W-30 Mobile 1. The Castrol is for $4.50 for Full synthetic. Haven't seen any actual test on rating synthetics v. synthetics. Any test out there?

anyone heard of / use the "royal purple" stuff? courtest nissan is selling that stuff now, next to the redline. its not as expensive as redline, maybe $5 - $6 a quart?

dfwmax

Forum search results for "royal purple":

http://forums.maxima.org/search.php?...der=descending

I can tell you that few here have actually used Royal Purple, although I've never seen bad things said about it; but I haven't seen a bunch of followers of it either.

As I said - LEGALLY called "synthetic". There was a court case over this. There is a difference. Castrol, Quaker State, Pennzoil and Valvoline won the right to call their modified dino oil synthetic, Mobil 1, Amsoil and Redline really are synthetic.

wdave