Recent content by tufftrux

I have a 2002 GMC WT5500 (ISUZU FRR) truck with a 6 speed manual transmission. The owner's manual says use SAE 90 GL-5 manual trans fluid. I only have Amsoil synthetic SAE 80W90 GL-5 gear lube. Is this lube compatible? Thanks, Luke

I've run the oil twice now, I bought the stuff anywhere from $45 for 4 gallons or up to $56 for 4 gallons. I've always been trying to find a good dino oil for my DMAX 7800 (7.8L) since for some reason, the owners manual says specifically not to use synthetic oil. So far the oil is pretty clear...

Does anyone out there use Lucas 15W40 Long Drain Truck Oil? If you do, how is it? Does it work well and protect the engine? I just poured in 13 quarts in my Duramax 7800 Diesel. I saw the experiment w/ the Oil Stabilizer after I just poured in the Lucas Motor Oil, I hope that won't happen with...