Depends on how you drive, where you drive and how long your oil change interval is. I found no difference in both power and fuel economy using casa oil, motul, zic and liquimoly. If you figure in the cost of oil, oil change intervals (5kkm vs 10kkm) and casa service cost vs non-casa the higher priced oil more than makes up.

I steered away from motul since i heard it is not what is claimed, that it is fs and it is not.