Which Oil Grade do I Need?
My 2013 Ram 2500 Hemi has "5w20" stamped on the oil filler cap. However, the owners manual says to run "5w30" with a gross weight of 14,000 pounds. Well, the truck weighs about 6200 and the TT weighs ...
Forum Discussion
JustLabs wrote:
Nonsense...
I've looked at hundreds of UOAs over the years and its rare to find a 5w-30 that doesn't shear.
You need to word this statement better.
ALL OILS SHEAR. Additives naturally "break down" while in use and can change viscosity. This is 100% normal.
My point has been, that it's rare for automotive engine oils to shear OUT OF GRADE during normal, recommended intervals. Some of the few reports that do show an oil out of grade, often have a higher than normal gasoline content, changing the oils viscosity.
