Question on E85 flex tune to 93 octane tune

7thStreetJim said:
I prefer to watch the oxygen percentage on the NGauge. With 93 octane my AFR is usually 14.7.

Its probably 14.7 because the Ngauge is set for E0 gasoline instead E10-E15 that most pumps have nowadays. The correct AFR is closer to 14.1 though.