Owner reviews for engine oil

The dealership here itself was using 5w-30 as the default for oil changes even though 0w-20 is stamped on the filler cap. After checking myself that Subaru said that would be OK, I started using it too for my own changes just to avoid flipping back and forth -- though I have no idea if that would be a problem. In any case, the Forester seems happy, even if the mileage may have dipped slightly.

Engine does become a bit quieter with 5w-30.

I would only suggest using \"premium\" oil brands, like Castrol or Elf, in correct specification.

I run 0W20 that is approved by BMW and have 255K KMS. No issues at all.

Buy Valvoline oil, and maybe it's a good time to switch to 5w-30 in it.

Castrol Power1 is really good though

The SC that I go to had 3 options Motul7100, Castrol Power1 and HP ProLube during 2nd service.

Prolube is trash used motul and my top speed increased by almost 10 on all gears on my d250

My last [Blackstone-labs.com](http://Blackstone-labs.com) report came back with 1.8% fuel dilution. 2021 1.5T at 23kmiles, 6800 miles on the oil (0w20 Valvoline R&P).

10k miles later, went to do my usual 1k mile quart of oil, looks like chocolate milk.