Well its time for me to take the plunge into Amsoil. I can get 12Q of the Amsoil SAE Signature Series 100% Synthetic Motor Oil for about $92 or I can get the 12Q Amsoil OE Synthetic Motor Oil for $49.40. Is one better over the other. Even with my other car being synthetic... I've been a believer of still changing them every 3000... anyone here run Amsoil longer? Do you guys follow the oil life indicator on the truck or stick to the mileage? Also, recommended filter? Now onto gear lube and/or trans lube or cases? Amsoil recommendations? Capacities? Im right at 25K miles on my 08 and also wondering if there is any major 25K mile maintenance I need to be worrying about or looking into?