Matt33
Registered User
what seems to work the best for the 7.3 idi? i know there will be many diffent ansers but looking to see what is posted the most so i have one to stick with. thanks guys, and girls. Matt
I run 5w40 in winter also. I use 15w40 in summer because I have several cases of it I got on clearance a few years ago.Is there any value in changing to a lighter weight oil in winter? If so, what weight?
Uhh... HELL. NO.will 15 40 be ok in -40f weather?