View Poll Results: which synthetic oil is the best
royal purple
17
4.42%
amsoil
73
18.96%
shell rotella
157
40.78%
other
138
35.84%
Voters: 385. You may not vote on this poll
poll what oil do you run in you engine
#72
Ive been running amsoil 15-40 for about 25K and there is 40k on the truck. i live in new england so 1 day its 90*F and the next is 10-15*F( doesnt drop past that to Often) and if i head north snowmobiling we can see -5*F or so. Is this good to be running that wieght oil? I have never had a starting issue it always started and its never been plugged in to help. I usually go about 7k-10k every oil change and it will usually drop about half or so(sometimes less sometimes more) on the safe mark on the stick. Is any of this good or bad?
#74
Ran Rotella in everything but now Premium Blue cause thats what Cummins recommends.