aldine

After reading your forun I stopped adding Marvel to my 5.9, My 5.9 is a 2007 no cat or filter on the exhaust, added 16 oz of Royal Purple 2 cycle oil , is that correct for this engine , seems to run a little cooler,mpg is 17.5 to 18 on the 4 wheel drive 3500, I did use your calculator to get the correct amount to add, Thanks KDUD