Ford Focus ST Forum banner

1 - 3 of 3 Posts

·
Registered
Joined
·
1 Posts
Discussion Starter · #1 ·
Title says it all, I live in NM and the area I'm in doesn't have 91 octane fuel, which is what the mp275 tune is programmed for, so could i run the tune with 90 octane without any issues or would I experience problems?
 

·
Registered
Joined
·
386 Posts
This should not be a problem, you might not get the full advantage of your tune but the difference will be neglible. The ECU will compensate and OAR might settle differently over time (closer to 1).
Fill`er up and go! :)
 

·
Registered
Joined
·
547 Posts
When I take my ST on vacation and have no choice, I've used lower octane fuel with no issues
 
1 - 3 of 3 Posts
Top