[SEATSV2016]

Tapout recommends the M1 Supercar oil for their Brown Belt cars; I was switched to that oil when my car was there. Prior to that, I ran Penzoil Ultra Platinum 05w-30. Before that, I used the factory recommended oil while I had the oil changes covered. At 40K+ miles, Tapout noticed I still had the cross hatching in the cylinder walls, so I can only assume that the AC Delco oil and then the Penzoil oil treated the car well. The car has been driven pretty hard in varying climates over it's life and has been maintained well. I can only assume that the 0w-40 will offer the same, if not a little better protection with the extra additives.

I have noticed that the car runs a little cooler, it takes a bit longer to get to operating temp and the oil temp cools off a little quicker it seems. I also have maybe 2 oil changes a year, so the extra cost for the 0w-40 isn't such a big deal. I'm sure it's fine for stock turbo cars too, but I'm not sure it's necessary.

 

[Submariner409]

??? Cross-hatching ??? Here's a Northstar with over 170,000 miles on 10W-30 synthetics. Today's low tension piston rings and aggressive finish hones are used to maintain oil film in the cylinder bores. The bottom ring is a tapered scraper ring with spring ring to control oil consumption.

..........and one with over 130,000 - 5W-30 synthetics.

Common today.