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gteclass · 06-19-2008, 11:14 AM

higher octane gas also lets you run at a lower rpm without lugging it. On 87 my mirage wont do 35 mph in fifth. But with 89 or 91 it will do 30 no problem, of course till i get to a hill, but it will still creep up most hills at 35.

06-19-2008, 11:14 AM	#15 (permalink)
gteclass EcoModding Lurker Join Date: Jun 2008 Location: Rhode Island Posts: 17 Mr. Miragi - '96 Mitsubishi Mirage S 90 day: 27.45 mpg (US) Thanks: 0 Thanked 1 Time in 1 Post	higher octane gas also lets you run at a lower rpm without lugging it. On 87 my mirage wont do 35 mph in fifth. But with 89 or 91 it will do 30 no problem, of course till i get to a hill, but it will still creep up most hills at 35.