Question

If one had to, any problem running 93 octane with 91 map?

MadRussian said:

If one had to, any problem running 93 octane with 91 map?

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I've done it with no issues several times in various cars and in my Raptor.

MR, this is what I normally run. No issues what so ever. You can always run a little higher octane than the tune with just a slight loss of power as the only negative. I like it because it gives you an error margin of a more conservative timing and allows for variation of gasoline – plus some places in US don’t carry 93 octane.

Runds great

Went to local Ford dealer to get an oil change today and left tune in.
After it was finished, service guys says: Man, your truck runs strong, must of been build on Wednesday (it was)