Fuel Economy - Toyota Yaris Forums

BailOut · 09-28-2007, 05:56 PM

I've done that. 89 Octane = a loss of 5% MPG, 93 Octane = a 9% loss.

I tried 2 tanks in a row of each to get a more accurate test (and the low numbers hurt my running tank average). Without a doubt I consistently get the highest MPG with 87 Octane.

Aside from my much calmer driving style two other things that may make a difference for me are that we're always on 10% Ethanol here and I'm at a higher altitude than most folks (my home is at 4,500ft., my office is a 6,350ft., and I traverse an 8,900ft. summit to get there).

09-28-2007, 05:56 PM	#11
BailOut Steals terrorist's lunch View User's Garage Drives: 2007 Yaris Liftback Join Date: Mar 2007 Location: Reno, Nevada, USA Posts: 1,299	I've done that. 89 Octane = a loss of 5% MPG, 93 Octane = a 9% loss. I tried 2 tanks in a row of each to get a more accurate test (and the low numbers hurt my running tank average). Without a doubt I consistently get the highest MPG with 87 Octane. Aside from my much calmer driving style two other things that may make a difference for me are that we're always on 10% Ethanol here and I'm at a higher altitude than most folks (my home is at 4,500ft., my office is a 6,350ft., and I traverse an 8,900ft. summit to get there). __________________ - Brian Share the Road I often carry 2 carpool passengers and mountain bikes or snowboards/skis over a 4,500 foot elevation difference. Click the graphic above to see my detailed mileage logs.