Quote:
Originally Posted by Cobb
Ive notice with the grill block when the temp gets above 185 the i2 starts to retard timing and upping the cvt ratio.
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that's strange on days that i use grille block my timings usually advance furthest and overall MPG improves. sometimes if i don't use a grille block my timing would not hit 44-46 deg the whole day...not sure why.
Quote:
Originally Posted by mechman600
I would say that the 4 mpg difference is because of the lower ethanol content in the 91 octane gas, not the advanced ignition timing.
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87 octane and 91 octane petro canada gas are both 10% ethanol. only shell v-power 91 here is 0% ethanol. i used 91 petro canada.