Probably going to change my transmission oil at my 54000 mile service. searching around mostly the reccomendations are for redline mt90 or amsoil.

My question is is this a bit of overkill on a standard v6?. do these reccomendations still hold or does anyone use anything else?. I think I need 2.2 litres anyone know a cheap place for mt90?. And finally to amsoil. after wirdys problems with amsoil trans oil do you do a gl4 oil that would suit?.

cheers in advance, steve