Ok i have a custom road tune by Al for 93 oct at Texas elevation. Tomorrow im driving home to colorado so Al provided me with a 91 oct tune for colorado elevation. When should i swap the tunes? And also there is one place in texas where i have to fill up and the highest octane the sell is 89. is this going to be a problem to run a 91 tune with 89 for a hundred miles or so tell i can top it off with 91? or should i find some of that octane boost and add that? thanks

 

ok well i made it to denver ok. Al that program for colorado 91 oct is working great. had 0 problems with the car. i broke my own record and made it in 10 hours and 1 minute. total time.

 

Glad the trip was safe!