Mike in CA

Depending on your state, there is no sales tax charged by Amazon. Also, if you have Amazon Prime like I do, ($75 a year) 2 day shipping is free no matter how much stuff you order during the year. Since I order a lot of things through Amazon, Prime pays for itself in about a month. Anyway, with the oil delivered to my front door it's worth the few extra cents a quart over what I can buy it for locally.

rome5982

Anyone know where to purchase the Porsche approved Mobile 1 in 5W-50?

lbpalm

Just chiming in on the oil wars and oil obsessive behavior...

I recently tried Redline 0w-40 for my 997.1 GT3RS (yes, I now it's not on the PAG approved list), and here is the results:

Very noisy engine on Redline 0w-40!

I will now drain the brand new fully synthetic "good stuff" (Redline), and put in 5w-40 Mobil1 "partial synthetic" for summer use.

Comments welcome on hot weather/track use oil weights, significance of variocam; approved oil list, etc., etc. (I've seen many comments about 15-50 for track/hot weather use, but also see more than a few negative comments about using this weight with variocam. (Am I wrong in understanding that the 997.1 GT3RS has variocam?)

- I've also seen posted somewhere that redline will foul the cat converters. Anyone heard of this or have direct experience??

- Does anyone know if any of the "approved" oils are fully synthetic?

Perhaps there is some rationale to the approved list... - I'm just about done obsessing over oil for this car and ready to use the mass-marketed Mobil1 recommended by Porsche unless anyone can tell me different.

Thanks in advance for any replies.

utkinpol

here.
http://store.avlube.com/mobil15w50.html

imho it is a cheapest price. i buy from there all the time.

gpjli2

Motul x-cess 5-40 fully synthetic grade 5 and approved

MHC2S

I've used RedLine in my old BMW M3's. one was and an '88 and the other a '95. Never had an engine noise issue and never had problems with the Cat's. This is all new news to me.

lbpalm

Hmm,
Well, I'll fire up again, but it sounded noisy the first time around.
- Do you use Redline in any of your Porsche cars?
have you tried 5-50 for summer use? (not approved...)
Thanks for posting..

alexb76

Motul 8100 5W40 Xcess - Porsche Approved. Best oil recommended for 997s (search forums, check LN Engineering, etc).

0W40 is too thin, and is mostly used to lower MPG. Although still a good oil, specially if you don't track, and are going to change more regularly.

Mike in CA

Alex, unlike the 0W-20 or 5W-20 Toyota recommends that my daughter use in her Prius, 0W-40 isn't a high MPG oil (I assume that's what you meant when you said "used to lower MPG"). It has the same viscosity at operating temp that 5W-40 does. The difference between 0W-40 and 5W-40 is at lower temps when starting, where the 0W-40 will flow a little easier for better start-up lubrication, and that's why Porsche recommends it. To the best of my knowledge, since both oils use the same high quality base stock and VII packages any difference in performance due to viscosity spread would be tiny, if it exists at all. Tracking or oil change intervals wouldn't be an issue, IMO.

alexb76

That's also important, but Motul has more zinc and literally across all circles it's recommended over Mobil 0-40. Viscosity numbers are close, but in operation 0W-40 has been reported to be too thin, and it does indeed provide better MPG, and also helps with emissions.

As I said in another thread, the head mechanic for our local Porsche, literally advises against using 0W40, specially outside the dealership .

At the end of the day, both oil are great, Porsche approved, but the extra cots of Mobil-1 is not worht it IMO, being inferior in some cases.

Spoddle

Here's a link to the Porsche approved oil list from 2010. Porsche Approved Oils

kkswow12

Mobil 1 is expensive in Europe because of socialism? . . . something like 80% of the oil/fuel costs in germany are tax, needed for the social programs that keep us all safe and warm...hmmm