DirtyErnie
Renaissance Hick
Check out this guy's page:
https://540ratblog.wordpress.com/2013/06/20/motor-oil-wear-test-ranking/
I've switched to this:
73. 20W50 Castrol GTX, API SN conventional = 96,514 psi
zinc = 610 ppm
phos = 754 ppm
moly = 94 ppm
from O'Reilley's 20w-50. GTX lasts a lot longer than the o'Really?s stuff; I had that stuff tapping out after one trip into Minneapolis and back. My gauge on how the oil is doing is how bad the shifting has degraded, and since late last summer, I can't tell any degradation on the GTX. Serious improvement.
https://540ratblog.wordpress.com/2013/06/20/motor-oil-wear-test-ranking/
I've switched to this:
73. 20W50 Castrol GTX, API SN conventional = 96,514 psi
zinc = 610 ppm
phos = 754 ppm
moly = 94 ppm
from O'Reilley's 20w-50. GTX lasts a lot longer than the o'Really?s stuff; I had that stuff tapping out after one trip into Minneapolis and back. My gauge on how the oil is doing is how bad the shifting has degraded, and since late last summer, I can't tell any degradation on the GTX. Serious improvement.