fuel types

[shmed]

ive been reading about peoply using different types of fuel before the e test..
like 88 octane some 94 and even a few that used 100 oxygenated type stuff.
is there one better to use then the rest?

 

[gofstbuick]

The oxygenated stuff will clean the emissions better. I've always used the manufacturers recommended octane for emissions test and have encountered any issues.