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just did my first oil change on my new to me 05 CTD 5.9 24v. The only synthetic other then expensive amsoil was 15w50. Is this ok to run?? I know 15w40 is the best to run, has anyone used 15w50 before??
the expensive amsoil is worth the money esp in the north....if you tow i would run the amsoil 15w-40 (amsoil) if you dont tow real heavy as in a major 5th wheel i would run the 5w-30 amsoil ......
I used to run Amsoil, and it's damn good stuff, but with shipping on top of the price, it was just too expensive. I now run Shell synthetic 15/40. I seem to have gained a little oil pressure.