That's not good. I just got off the phone with a rep from a local refinery (Goa Northcoastal) and he said the 20w-50 would actually be better for my engine. He said you can always go thicker, not thinner. I am using 10w-40 Torco in my 400cc twin inline and after about 20 miles of 5000+ rpm's the head gasket starts to weep and run down the outside. I thought if i went a little thicker, this would not happen. But, i know a thicker oil tends to get hotter because of the added fricyion of being thicker. He also said the thicker oil would make my clutch react better. ????