but doesn't it have the potential to burn more completely?

 

Nevermind, I thought there was an 87 octane map, just checked and didn't see one. Will the "Anti-Theft" map help with gas mileage?

I only fill up once every 2 or 3 weeks anyway, so the gas prices don't have a huge impact on my finances.

 

No... in a car that isnt made for it it will actually burn LESS completely because it will ignite later.

91 is 87 with extra paint thinner added (basically)

 

Prius murdered out with a body kit and slammed FTW!

 

doood gay minds think alike.

 

QFG

 

homos

 

just to add something to the discussion, i know that the 4th generation Preludes with the H22A motors (which require 91 due to high compression) lose a LOT of mpg if you try to run 87.

that and they also run like crap.

i know that this doesn't mean the same thing will happen with a subaru, but it's still food for thought.

 

OK put it this way. The scoobys have what a 15.8 gallon tank so for easy math we will say you didnt run it bone dry. So your gonna fill up 15 gallons. Gas at joe blow gas station wants $4.15 for 91 and $3.95 for 87. YOu would save $3. thats not even one gallon of gas. I mean ya 3 bucks is 3 bucks. BUt just shift before 4k rpm and you should be ok. If you wanted to save on gas why did you buy a subie?

I would never put anything but 91 in my car. Thats why I bought my wife a prius. All th money she saves in gas I can put into my car. Shell, Chevron, or occasionally costco gas. NOthing else goes in her. I have torn down to many engines to put ROTTEN ROBBIE gas in my car's Honey Hole (good one Mr. Furley)

 

I'm not a fan of Chevron's techron. I use shell as often as possible.