Larry Martin said: >AMSOIL swears their synthetics won't hurt our >trans but it is still GL-5 so who knows. AMSOIL does make a GL-4 (it's in my tranny right now). It's often not listed in their catalog correctly. Go in to the "Company Store", not "Product Info". http://intershop.amsoil.com/cgi-bin/Amsoil.storefront/3c703aab0caf55f4271bd1 f0e3f0073e/Catalog/1160 Steve in Indy