Engine oil PENNZOIL or AMSOIL

My 2016 GT350R has almost 25K miles and has never needed oil between changes. I use Amsoil every 5000 miles, sooner depending on track abuse.

At the very least, make sure you're using quality oil like Mobil or Castrol or Pennzoil.

Amsoil 100%, I tested it quite a few, and I’m noticed the least amount of decoration and power loss with it

I use Pennzoil Platinum 5W-30 in my 2011 328ix (N51) I believe that is the recommended viscosity.

I use 5w-30 pennzoil ultra platinum full synthetic with the oem motor craft oil filter

I change my oil every 3k miles

5w30 Amsoil, ignore the tick it's normal.

Amsoil engine oil

Frankly, we ran 0W20 for the first 175k miles in our 2017 RAV4. I changed to 5W30 because my Turbocharged Mazda also calls for 5W30.

I've been using Penzoil ultra platinum full synthetic 0w-20, though it does burn sometimes a quart every oil change.

Amsoil is overpriced and underperforms. I’ve bought $1000s of dollars of their race oils and have slowly realized all are near the worst on market, always the worst for the coin.