Looks like the wife and are going to dinner in Windsor, Ontario soon with a quick stop at Canadian Tire...

Kevin,

I noticed recently that some of my bottles of Mobil One 0W40 say "Euro Spec" at the bottom of the front label while others don't. Would the "Euro Spec" oil still be the good formula or does this label not mean a damn thing?

John, they changed the formula (pulled the zinc additives), it should meet the list on the bottle> MB 229.5, Porsche Approval List 2002, BMW Longlife 01, Chrysler MS-10850, GM-LL-A-025(gas), GM-LL-B-025 (diesel), VW 502.00/505.00/503.01

The 5W50 has these approvals on the label.. API SM, SL/CF and meets ACEA A3/B3/B4 MBenz 229.3 MB 229.1, VW 505.00, Porsche Approval List 2002

50 weight just seems so thick at my temps...

__________________
Statman
04 996TT Cab (description & pics)
Go Buffs!
Fight On!

In the winter, summer is where it will shine, I like the thicker 5W.

Have you run any Royal Purple race oil?? I use it in my racecar, (after they pulled the old "green" kendall that btw was the best oil for blown alcohol i've ever found)

The old Mean Green Kendall is now manufactured by Brad Penn from what I understand.. I consider Redline/Amsoil and Royal Purple and others that I haven't mentioned, Boutique oils. At the end of the day, we as individuals have to decide what is "best" for ourselves. I have ran Mobil 1 for many years, and since it is the factory Porsche fill, I am required to stick to that trend.

Would a new 997tt come filled with the "old" or "new" mobil 1 ? And if you take your car to a dealer I assume you would get the "new" stuff but in it?
As a side note when we did the motors for the Mobil 1 trans- am team cars we used there oil and never had any issues at all with it. We even tried it for break-in on the dyno a few times and no issues with leakdown etc.

Now I'm (you're) thoroughly confused. According to Dr. Haas (Ph.D. in biochemistry who has studied material viscosity for decades) 5W40 and 0W40 are the same weight when at operating temp. The difference is when they are cold (so to speak). 5W is more viscous at cold temp and therefore does not flow well when you are warming up the car. Why would you want thicker? This can not be good.

Here is a very informative link:

Motor Oil

__________________
Statman
04 996TT Cab (description & pics)
Go Buffs!
Fight On!

I think that geography comes into play.

If I was driving my car in Denver (year round) I would leave the 0W during the winter and change it in Spring, Porsche has approved the 5W Mobil 1 in the owners manual.

The question is, are you comfortable with running a changed oil formulation that has reduced zinc or running the formulation that had the previous levels ala the 5W50.

We also have a dry sump engine, the oil that is available on startup to the bearings and lifters is at high pressure and at high volume. Oil starvation is not something that we have to worry about. Interesting enough, on the General Motors engine starting instructions, they recommend 5W30 on a 6.2ltr powerplant (factory fill).