Re: can i use 5-40 towing
Yeah it is a pretty good over view but don't go into that great of detail...
"The difference between multi-grade and straight-weight oil is simply the addition of a viscosity improving (VI) additive. The most common grade of automotive oil in use today is the 5W/30, which is a mineral oil refined with VI additives that leave it reading as an SAE 5W viscosity when cold, yet an SAE 30W when hot (210F). The advantage to the multi-weight is that when starting the engine, the multi-viscosity oil (with its thickness of an SAE 5W when cold), allows the engine to spin over more easily."
That is a typo cause per SAE j300 30w does not have the same operating temp properties as SAE 30.
That is all my post before was saying is that the 0,5,10,15,20w grades do not correspond to the non-w grade since they are determined based on different criteria.
2002 F-350 ECLB SRW 7.3 4R100
6637 203* t-stat 08 diff cover Stancor HPX 6.0 trans cooler, Zone offroad leveling kit, Western UM 8'6" plow
Sold: 2004.5 Ram 2500 w/ 5.9 CTD, Reg Cab 48re