My truck junks motor oil pretty fast. Was wondering is it worth it to get a single bypass or just change the oil more frequently. I run ams oil 15-40 so i want to keep the oil good longer. on my old furd I ran on called the oil gaurd which was a tp filter it worked alright. Also I am a dealer for amsoil I can get there single bypass. For those with systems which ones are you running and are you happy with them. thanks dave. kinda looking for trucks that are far from stock like mine please.