All, Well, I've done it now. I brought home a new class A. Mine is on the FORD F53 chassis. The oil fill cap & owners manual state it is to use 5W20 motor oil ? WOW! That sure is thin....
I use 5W30 in my 02 V-10. They put out a bulletin That states to now use 5W20 in my engine that was originally designed for 5W30. So i am using 5W30. In the winter I run 5W20. Now some engines require the proper oil to have the VVT system operate properly.