Just curious. I have a 1990 Montero (4-wheel drive with a manual transmission) and Mitsubishi specifies a GL4 75w-85w oil and the Amsoil fits that spec. Also, Mitsubishi recommends to add their Friction Modifier to the transmission. What does the Friction Modifier actually do, and is it necessary when using the Amsoil product? Thanks.
- posted
17 years ago