i have used nothing but motul chrono 300v for about 3 years now. I also use nismo, or greddy filters (also used sard mag, and power enterprise). It's good oil and not expensive at all for what it is. read into this what you will but I have been running the car with that oil hard for a fair while with no engine problems at all. yet I know of plenty of guys running mobil, and castrol that have had engine failures... I'm not saying it's the oils fault, mabye it's just coincidence? maybe buying cheap oil is an indicator of how much people spend on looking after there car? i don't know. what I do know is the chrono 300v works for me.