This is an interesting treatise on the subject of oils for Porsche's. There is probably more information than most of us can use or digest. LN Engineering, those good folks who seem to have the definitive answer on IMS issues, seem to be rather down on Mobil 1 as the formulation has apparently changed in recent years. Hence, after reviewing their testing, I've decided to switch to Motul 300V which can be ordered from Amazon. Its High-Temp, High Shear rating is ~50% better than Mobil 1 which makes it superior for summer track work. Unfortunately, it's about 3x more expensive as well. LN has now stopped selling this product in favor of Joe Gibbs DT40 but I am told this is only intended for for cars without catalytic convertors. Over time it apparently will clog the cats quite significantly. I have not verified this with LN as of yet. Anyway, for those of you with an interest, here's the article. Best,
http://www.lnengineering.com/oil.html

 

good read!!. What oil viscosity did you use 5w-30 ??? It was interesting to read in the article that some guys were switching too motorcycle oil

 

No, I went with 5w40. If you go about halfway down the article's page, there is a section that says in bold print, Do not run any 0w30, 5w30, or 10w30 oil in your Porsche, aircooled engines included! Hope that helps!

 

omg I missed that thanks man!!!

 

This thread has got me interested in finding out how motorcycle oils would work on the porsches.. They are designed for high RPM engines...Just an Idea

 

http://www.speedysgarage.net/hondacb...ilanalysis.htm

 

Update: This is the response I received from Charles Navarro who authored the article on LN's website. I will likely go with Joe Gibbs product since it's cost profile is significantly better than the Motul 300V.


"DT40 is not a race oil and is designed to be compatible with daily drivers with cats, however it can be used for the track with excellent results."

There you have it!

 

Thanks for the thread....I have 2200 miles on my 997.2TT and needed to get my oil changed...just ordered Motul 8100 from LN Engineering.....

 

The article is for air cooled, but you posted in the 997 forums? Am I missing something? I'm currently running 0w40 mobil 1 per my dealers recommendation ;o

 

The article blends info for both air and water cooled motors. Just need to make sure whatever part you're reading is applicable to your situation. Best,

 

Ah, I see. I will take a closer look

 

anyone uses Lubro Moly 0w40 oil ?

 

i guess all the 40 are good just stay away from the 30's and the first # is depending on your climate and what your doing and such .. Since I live in Alaska Im going with 5w/40 although 0w/40 would not freze as easy and warms up quicker..I think 5/40 is a good all around weight to use in alaska

 

Ive been using Eneos Sustina instead of the Mobile 1

 

Motul 300V is a fantastic product. I believe it is also approved by Porsche.