Casper,None of the Shell-Rotella straight 40W from Wal-Mart I've seen is for two-stroke engines.I buy the WM store brand 30W "Heavy Duty" oil rated for CF-2 because they don't carry it in 40W. Next time I'm near a WM I'm going to take another look at Rotella, maybe I missed the CF-2 on the label. Rotella is supposed to be the best diesel lube oil on the market but also the most expensive.
Casper,None of the Shell-Rotella straight 40W from Wal-Mart I've seen is for two-stroke engines.I buy the WM store brand 30W "Heavy Duty" oil rated for CF-2 because they don't carry it in 40W. Next time I'm near a WM I'm going to take another look at Rotella, maybe I missed the CF-2 on the label. Rotella is supposed to be the best diesel lube oil on the market but also the most expensive.[/quote]i went to the DD dealer and bought the 40wt they sell, it seems to work very well, oil consumtion is at a minum and i havew just a few leaks.if the 671 didn't leak a little i would start to worry about it. i would rather pay a little more and get the best oil i can find