just went to auto zone to get the usual euro castrol 0w-30....no longer made!!!!! it is now american made. so does this mean it is still a full synthetic or not? anyone else have this happen? damn autozone. also, what would be the next best thing?

 

might have to order overseas online.

 

is this stuff good enough to do that or is there another synth.?

 

You could look into Amsoil

 

Yeah, sorry dude. GC is no more. The US made oil is a G3 base stock, just like the rest of their line. It's not that bad of an oil, but Pennzoil Platinum 10W-30 has done much better in UOA results for less money. I would say the best replacement for you is Mobil1 0W-40. The cSt values are almost identical, and the M1 0W-40 has excellent UOA results. Check the sticky thread in the main Engine/Drivetrain forum titled, "Oil Analysis Thread"
Will

 

That really Chaps my ***... I just started using it !!!!

 

Prob no sense in me switching to GC now, then... I have 5 qts of it I purchased a few months ago to have on hand when I switched over, so if anyone currently using it wants one more batch of it for their Z, PM me. Dunno what it takes to ship oil, though... If anybody in SoCal wants it local, that'd be cool.

 

what about Royal Purple????

 

As Resolute says, check the "oil analysis" thread in the main engine/drivetrain forum. Royal Purple has not fared well in the oil analysis done thus far on the VQ35DE. He has done an excellent job of listing the pros and cons of several oils there and is collecting a database to offer factual information about the subject.

 

yeah...as soon as they guy told me, i went to the 4 or 5 nearest Autozones and bought all they had....that being said, all they had ended up being 10qts total. I was under the assumption on the oil analysis page that the mobile one stuff wasn't as good...or that it wasn't a true synth...am i right? pretty much looking for the next best thing that can go 5-7k between changes.

 

HAPPY FREAK'N BIRTHDAY TO ME!! found a local place with some more GC in stock. I now have some in stock...not them!!

 

I started using Castrol Syntec 10-30w. I think its better then Mobil 1. The Z gained 1mph in the 1/4! same conditions.

 

I don't know what the deal is with GC, but after being off the shelf at my local Auto Zones for over a year, they are now stocking it again. They had the US made 0W-30 before, but now the GC is back. Maybe customer demand has something to do with it, I dunno. But it's nice to see it back on shelves.

Will

 

No.
I've never said that M1 wasn't "as good" or a true synthetic base stock. To the contrary, if you read through the oil analysis page, you'll see it's quite the opposite. M1 oil analysis results are all on the first page, you could just look for yourself, and M1 0W-40 has always been a recommended oil.

Will

 

works wonders i only settle for the purple stuff