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Interesting phenomanon... I put in 5 gal of 100 octane a couple weeks ago, now my MPG is up...

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Old 05-05-2006, 03:02 PM
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Default Interesting phenomanon... I put in 5 gal of 100 octane a couple weeks ago, now my MPG is up...
That was 2 tanks ago, and I take my tank down till the fuel light is on. So I'm pretty sure there's no 100 left in there.

I wonder if the 100 octane adjusted my fuel trims or something to cause me to get better mpg?

Same in town driving. Same driving habbits, same place to get fuel (other than the 100).

I'm talking like an extra ~30 miles to the tank.

WTF?
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Old 05-05-2006, 03:08 PM
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Not a phenomenon at all: It cleaned your injectors and the top of your cylinders/plugs.
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Old 05-05-2006, 03:10 PM
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2nd. I notice my car always runs better after a tank of 100 octane.
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Old 05-05-2006, 03:11 PM
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o so leet.. Im getting me some 100oct.... +30hp... +30mpt.. almost worth paying $7.50 per gallon
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Old 05-05-2006, 03:14 PM
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I usually get worse MPG....but it could be the lead from the C16.
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Old 05-05-2006, 03:17 PM
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Where do I sign up? I can't find 100 oct anywhere in my area...
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Old 05-05-2006, 03:32 PM
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I wouldn't figure the 100 would... The T Sauce, yes!
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Old 05-05-2006, 03:40 PM
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Default Interesting, after two full tanks of 100, I now have a rough idle
idle misfires, mostly on cyl 1. I'm gonna do the 1 hr water/fuel/detergent @ 2500 rpm treatment my mech recommended.

Maybe I had rough idle before, but didn't notice.

Glad 100 oct is still $4.70/gal.
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Old 05-05-2006, 04:41 PM
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Default your 100 oct is less than 1 dollar difference from my 91. Also my car always ran smoother on 100
than it did on pump... never heard of it being rougher.
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Old 05-05-2006, 04:42 PM
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Default afaik the toulene actually places deposits on those parts. that is why you should not use more than
a 30% mix, that is what I always understood anyway.
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