Join Date: Mar 2013
Location: Cerritos, CA, USA
Car Year: 2015
Car Model: Forester XT Touring
Transmission: Mishimoto Cooled CVT
Feedback Score: 0 reviews
I'm in CA so my go to is Shell 91 V-Power. Our blend "may have" up to 10% Ethanol...
That being said if my powertrain was completely stock I may be tempted to run 87. :-/ (especially with gas prices soaring upwards here once again) You can run it at a loss of power and fuel economy and you may want to add some Techron every other fill up. As, here at least, the lowest octane fuel doesn't have the amount of "cleansing" additives as the 91 octane. It apparently doesn't take much in that department to be on the "Top Tier" list as Arco is! To be honest, and with complete disclosure, in the past five years, on my two previous Foresters that were NA EJ25 single cams, I ran Arco 87 with no adverse effects nor noticeable difference in power or fuel economy compared to the usual three "Top Tier" brands at the same octane. I did run a can of Seafoam through a tank of gas every oil change.
I loath those of you who have 93 readily available!!! just an Accessport Stock Stage 1 93 octane is a 10% boost over 91 in hp/tq and fuel economy!
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