Or you can use Redline, 1,200 PPM ZDDP (
Zinc Dialkyl Dithio Phosphate) even in their 5W-30. Redline also sells ZDDP additive. Mobil1 has 800 PPM in their 5w-30. I had the Redline 5W-30 tested and the testing backed-up their numbers.
www.redlineoil.com
Redline is available at
www.hrpworld.com
Bob