I get royal purple for the same amount I would for full synthetic motor oil. I use it all the time now and it works great. There was a drop in my temp and the motor runs a whole lot smoother then it did before and runs stronger. It was recommend too me by a few friends ranging from spec-v's to hondas so i said what the hell I'll give it a try. I now recommend it. Just give it a try. I only use it for the motor. For the tranny I use Redline MTL.