Owner reviews for engine oil

Motul or Penzoil.

Motul is definitely the best

My car only gets Pennzoil Ultra Platinum. Seems like a good quality oil!

Mobil1 should be fine. People are anal about oil but I've got 90k on my wrx with regular oil changes every 3-4k miles with Pennzoil ultra platinum or Mobil1 Extended Performance.

Edge Professional 508 is excellent, however, I have to agree with @VWmechatronic , the Mobil 1 sourced stuff is top notch. Almost 5K on mine and level on dipstick has not moved.

My 10k UOAs on Castrol 5w40 were just fine, but VW 504 is mid-saps so it might not have as much staying power even thought it's "better" oil.

Our Tig is coming up on it's 4th change (every 5K) and hasn't lost any significant amount between changes. So far all changes have been the 508 spec Castrol 0w20.

You can't go wrong with the Amsoil XL. I run OE 5w30, which offers plenty of protection for a stock engine. Unless your tolerances and clearances have changed, there is no reason you need 5w40. Modern synthetics, especially ones designed for the extra heat of a turbo, are outstanding oils.

Nothing but the best. I personally use Ravenol. I have a bew and very particular about our because of cam issues. I would only substitute this for liquid Molly.

I use Mobil ESP VW507.00 5w30, which is on the approved oil list and I buy for $30 when it goes on sale at Canadian Tire.