OK, thanks!Nope, we have three different engines in the FL's, from oldest to newest:
- C7 CAT
- Mercedes ~7L
- Cummins ISL
The ISL is actually the one that has the biggest difficulty starting in cold weather, even when it has been plugged-in all night.
The Kenworth has the Paccar (Cummins) PX-9.
Cold starting temps?Interestingly, the county here runs Delvac 1 5w-40 (or did) in the plow and salt trucks. Our local International dealer used to stock tons of it because that's where they bought it from. I haven't been in that shop since my buddy left for a foreman position managing a bus fleet, but I suspect that's still the case.
What is the advantage of EP then?Identical story except with Castrol and not for 35 years, but more like 6. I'll pay a few dollars to stick with what I know works, and if I get a rebate even better. I'd go M1 first before ST if I had to. Nothing wrong with ST, but I just don't want it for my applications. That said, I have tried other oils on and off, but my primary fill has been Castrol for a long time now.
I even pay the extra few bucks for EP but don't run extended intervals.
I noticed on one of your other thread responses that you stated one was using synthetic 5w-40 and the other 15w-40. That could make a difference in one being easier to start. But you already know that!
I know nothing abut the Mercedes engine but from experience the CAT will use more fuel but will be more reliable than the Cummins.
I'm willing to pay 4 dollars for what might be a more stout oil. It's a feel good thing. I also have a strange application with a 1.4 turbo, tuned engine. Fuel dilution is a problem for me, along with high output on a hamster wheel sized engine.What is the advantage of EP then?