caug wrote:i mean mobil one oil 5w30.96 cobra rated at300hp gained 5 hp on dino.
Ah! okay. I get it now - sorry for the misunderstanding!
I use Mobil 1 0W-40 regularly in my 2003 M45 - oil and filter are changed at 3750 miles consistently, and I have to admit that I do not see any perceptible difference per se in the "seat of the pants" power estimate. I use the synthetic engine oil for its engine protection capabilities rather than anything else.
But, since I have not dyno'ed my car (before or after the change that I did from regular oil to synthetic), I do not know if it had any effect per se. I now have about 43,750 miles on the car (bought it new three years ago) and I am still happy with its performance and luxury mix ...
Z