Originally Posted By: rurockn
I guess I have to update my profile, I moved to Texas a few years ago when we had 39 days straight over 100° and ten days over 110°; coming from northern Illinois this always concerns me with the oil choices I have made in the past! Haha
My car eats about 1/2 to 1 quart at about 3500 miles. It runs great, no problems what so ever. This is my first European car and since the dealer has always done the oil (warranty just ended) I never realized it was 5w40 until just the other day when I asked what oil they put in the car.
I use 5w30 Pennzoil Platinum in my wife's Caravan, and 5w30 Royal Purple in the 351 in my drag car.
That engine is known to eat oil. There was an issue with piston rings on that engine. I do not think it is big deal, but I know VW updated rings.
5W40 that VW/Audi uses in dealership is POS! It does not met MB 229.5 requirement. You may ask why is that important for you considering you drive Audi?
Well, Mercedes Benz has most stringent NOACK and deposit control requirements. MB229.3 that 5W40 Castrol meets is outdated and allows NOACK up to 13% compare to MB 229.5 that has NOACK up to 10%. That has direct influence on oil consumption as well as carbon build up on your valves.
Here are options:
First of all, always choose product that meets VW 502.00 requirement. That is not overly stringent requirement, probably least stringent of all Euro requirements, but it is what Audi wants.
Second, always go with product that together with VW 502.00, also has MB 229.5 and BMW LL-01 requirement. Apparently BMW updated their LL-01 requirement and it seems to be now hardest one to meet. New Mobil1 0W40 does not carry that requirement (I think not relevant in your case).
Third, grade is not issue if all these requirements are met. What you want is actually strong HTHS! So, Castrol 0W30 which was darling among Euro owners for years, has HTHS of 3.58cp. New Mobil1 0W40 has HTHS of 3.6cp!!! So difference is 0.02cp! Castrol 0W40 that uses same base like 0W30 and same additives except few details like viscosity modifiers has HTHS of 3.7. I use it in Tiguan, and I think it is better then older version of M1 (splitting hairs here).
I used in my VW CC 0W30 Castrol in Alabama in Montgomery where temperature goes to 110 and humidity to 98%. Never used drop of oil.
So my take:
1. Go to Wal mart and get either 0W40 castrol or Mobil1! I ahve not tried new Mobil1 0W40 FS that is GTL based, but no doubt it is good oil.
2. You can get Pennzoil Platinum 5W40 on Amazon, but why pay higher price when Castrol and Mobil1 in Wal Mart are dirt cheap and are if not the best, probably one of the best oils for Euro cars.