jbres79

For the last 5 years of owning my SS i have been using Mobil 1 5w30. It has always been a great oil (so i thought). After reading a couple of different threads about the Grade or quality of Mobil 1 going down i was very dissapointed as being a loyal Mobil 1 user.

Can someone please explain to me what exactly has changed in the Mobil 1 formula which makes it so crappy compared to its former self . just remember i am not an oil expert(im also looking for actual articles because when i do a search on google i cant find anything about - probably for good reason as Exxon does not want anyone to know).

also, i am thinking of switching to Valvoline Syn Power 5w30. does this sound like a good choice or is there something better out there for the LS1. i live in Canada so no 40 or 50 weight.

thanks in advance.....

Mr. Luos

iTrader: (9)

They went from a Basestock IV to a Basestock III.
In the states they can still call it a full synthetic. Wouldn't be able to in Europe though as I understand it.

I switched as well.
Went to 10w-30 Pennzoil Platinum.

Russ K

iTrader: (1)

I use Mobile 5-50 performance oil, it doesn't have the starburst symbol, so it has more zinc than the "new car formula" oil. The reason for reducing the zinc is to help prevent the cats from clogging before the emission warranty expires. As all cars use some oil.

Russ Kemp

GuitsBoy

iTrader: (4)

Mobil1 is on the thin end of the 30 wt spectrum. Id step up to a 40 wt mobil 1, or any of the other great choices available. I also like the 5w40 turbo diesel mobil 1.

Third Gear

iTrader: (3)

Mobil 1 5W-30 is 11.0 @ 100 C* cST.... so it's not exactly thin. a 30wt ranges from 9.3 to 12.49. So it's not that bad. Acutally Amsoil's are a bit thinner at 10.6. I'd still pop for Amsoil because I'm paying for Group IV and getting Group IV, not paying for Gorup IV and getting Group III

Skip the Valvoline, it's probably no better than M1 if not worse. If you don't want to run a xW-40 because of the coldness, then Amsoil's ASL 5W-30 would be a good choice. It's 100% synthetic. Don't get the any of their XL line - while still as good or better than M1 I've heard that they use Group III base stocks (highly refined/modified dino oil) versus their other lines that say "100% synthetic" are Group IV. Also one of their EaO Oil filters would be a good choice.

Go do some hanging out at www.bobistheoilguy.com if you want be overwhelmed with oil information... but it's kinda fun

vettenuts

iTrader: (4)

I just ran out of my GC so I joined the Amsoil preferred customer list and bought two cases. That is what I ran before and had good results.

jbres79

thanks for the replies guys.

just a question, how did you find out Mobil 1 went from iv to iii? Where can i read about this?

vettenuts

iTrader: (4)

Go over to "Bobistheoilguy.com", there are a lot of technical oil discussions over there.