You still don't get the point of the post, don't ever assume how much someone may or may not make, by your rational the factory optimizes the car so why would you need to mod anything? I mean... They run great on 89 or 91 octane so why bother with 93 or race gas? I mean talk about ROI... Gas is totally consumable there's literally none there so you must use the cheapest available... And unless your car is a rare low pruduced model your whole car is a huge loss on the ROI side of things... So once again, do you plan to contribute anything to the discussion or just continue being the village idiot?