IS it worth it to fill up 50% 91 octane and 50% 100octane? I am currently tuned at 91..

 

No.

 

Yes, if you run more boost. Yes X 2 if you run more boost AND get a second map for 95.5oct (50/50 mix of 100 and 91). If you do nothing but just add some 100 to your current setup, then the only power you could gain is power being LOST due to knock on the current tune (if there is any).

 

[QUOTE=Warrtalon;6040378]Yes, if you run more boost. Yes X 2 if you run more boost AND get a second map for 95.5oct (50/50 mix of 100 and 91). If you do nothing but just add some 100 to your current setup, then the only power you could gain is power being LOST due to knock on the current tune (if there is any).[/QUOTE]

Case in point?

 

I will probably just get retuned to a higher boost with 100 octane. Thanks for all the info.