Engine oil Mobil or Castrol

for the ow-30 im guessing your talking about german castrol. thats what im using right now and it works well

I used Mobil 0w40 in mine all the time

IMO most anything is better than Castrol!

I have been using Castrol 0W30 European Formula all year round and it offers great protection in the coldest cold and the Highest Humid Heat. I used to use Mobil One 0W40 but it seems my car likes the Castrol 0W30 better since it runs smoother and gets a tad better gas mileage.

I switched to Mobil 1 0w40 european formula in hopes of better protection and less consumption. I have 51500 kms right now. I will check mine every 1500km this next oil change.

Mobil 1 Turbo Diesel Truck 5w40 should be able to go longer-- but you need to get a Used Oil Analysis done, in order to determine if you can.

Speaking only for the 2.0T in our B7 A4...it burned nearly 1qt of Castrol Syntec 5w40 during a 5k interval. Before and after that interval I ran M1 0w40 for 5k, and it burned next to zero. Needless to say I'll continue to use the M1.

0w40 and 5w40 Mobil 1, both perform nearly identically from what I can tell. I think the car started a little quicker in the dead of winter when I switched to 0w40.

You should be ok I run Mobil 1 0-40w in my 120k 1.8t and I have no isues what so ever

i'm running the 0w-30 and it seems to have appeased my miata's normally (for all of them) ticky lifters. it starts better cold too.