Brand of Gasoline

[Grant Lenahan]

> but isn't it feasible that with low octane gas in the tank
> you go WOT, maybe to merge on the freeway, leading to detonation.  The
> computer decides to retard timing.  Then the whole time you are on the
> freeway the timing is retarded, leading to less efficient combustion.
> Whereas if higher octane fuel had been used, that would not have happened?
> My understanding is that the decision to retard timing will stay in affect
> for some time.
> 

Yes, that's exactly right. But its a very small proportion of total miles driven.

Grant