theiceman

Ian I gotta ask ..wha are you using ?

dshepp806

the lower # will be dependant upon environmental temp at startup, right? (as to "appropriateness") IOW, 20W50 would not be a choice for sub -10 deg. C but 15W would get me down to -`5 deg. C (example).

Using Royal Purple 20W50 Max Cycle,..currently under testing.

Best,

imcarthur

I just put in Castrol GTX 20W-50. But I had to change it because I did a Techron treatment & I didn't want to leave the dirty oil in all winter. I have ordered 3 cases of the Brad Penn oil & I will change it in the spring. 20W-50 again.

Ian

bgiere

There are many oils that are still "CI" or "SL" rated and still have the necessary additives. I've found many of them at the Virgin Oil Analysis section of Bobistheoilguy.com