Anyone run 20w-50 oil?

[3fordparty]

The 20w-50 oils I've seen are not "diesel rated" oil, what kind of damage would be done if someone ran 20w-50 in their powerstroke?

[nismofan240]

just dont use it, 5w-40 and 15w40 have worked great for everyone. why do you need to use a 20-50?

[nismofan240]

stick a straw in a jar of peanut butter and try to suck it out.......now imagine your motor doing the same thing.

[3fordparty]

Originally Posted by nismofan240

just dont use it, 5w-40 and 15w40 have worked great for everyone. why do you need to use a 20-50?

I'm not going to use it, but I remember a thread were someone was using 20w-50 and was having good results, but with no soot protection I think they might have problems down the road.

[harley1rocker]

in the summer,the thicker the better,right? this is a good question.I WOULD NEVER RUN 5W IN MY TRUCK.15w 40,its heavy duty,20w is thicker,why would it not be better?