Cheetah- (about Castrol Syntec)
Syntec is good oil, I just don't like that they're advertising it as synthetic when it came from the ground. Doesn't seem right to me, so I don't want to support Castrol by buying their oil. OR Quaker State, for that matter (but at least they call their Q a synthetic blend).
daman- (about the ACE Hardware oil)
See, I have no idea what'* in the bottle. It could be crap, or it could be some of the best oil around for the cheep price. It sounds like it should be good oil, but I just don't want to chance it on my car.
Here is a good page about oil, although it'* targeted at Motorcycles and their special needs because they run the oil through the transmission.
If you don't like reading, scroll down to "Group II and Group III oils" and read through "Synthetics." I would also recomend reading "API Oil Standards," it explains why newer standards aren't always better, just newer.
Another article: http://www.viperclub.org/articles/oilfaq.html
A discussion on Bob is The Oil Guy: http://theoildrop.server101.com/ubb/...c;f=1;t=013771
The statement made in the first post if false, but there'* some good info later on in the thread.
By the way,
Group IV = PAO = true sythetic = Mobil1
Group III = Castrol Syntec = Highly refined crude oil
And Amsoil is probably the best oil you can buy, but good luck finding it in stores. That'* why I use Mobil1: it'* damn near as good, and I can actually find it in stores.
Probably more information than anyone wanted to know, but Knowledge Is Power
. Hope to see everyone making informed oil purchases in the future.