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flex fuel 5.3

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Old 05-13-2007, 09:47 PM
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um i got an 02 chevy silverado 1500 how do i know if its a flex fuel i bought it used no info
Old 05-13-2007, 10:04 PM
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green gas cap is the easiest, but i dont think any 02s were flexfuel
Old 05-13-2007, 10:30 PM
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Mine is... 02 Yukon. If it has a Z in the vin, it's flex fuel. Also, if you bought it from the stealership, it'll say on the lil window sticker thing if it'llt ake e85 or not.
Old 05-13-2007, 10:31 PM
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Originally Posted by ramdaspadhye
Mine is... 02 Yukon. If it has a Z in the vin, it's flex fuel. Also, if you bought it from the stealership, it'll say on the lil window sticker thing if it'llt ake e85 or not.
Tis correct!
Old 05-13-2007, 11:53 PM
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Actually, the gas cap is yellow on the E-85 models, and it does have a Z in the vin.
I have a new body style 2007 and it is flex fuel. I ran it last week on all e-85. From Holt Mo to Garden City, KS and back. Was 1,100 miles. The E-85 got about 11.5 to 12.5 mpg and gas has been getting me 14.5 to 16.5 depending on my speed. The trip this past week was mostly 80mph across I-70. There were also some times that I was 85 to 90 on the side roads because there was no one around, and I couldn't help myself.
Truck has about 5,000 miles on it.
Truck runs good on it, and the exhaust actually spells good.
Hope that helps.
Old 05-14-2007, 12:59 AM
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MPG vise, calculate on a 30% worse fuel consumption running E85, on top of what you get running gas.

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Old 05-14-2007, 06:43 AM
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I could only find one place that carried it and they said its only 93 octane and only 22 cents cheaper than regular 87. WTF
Old 05-14-2007, 06:49 AM
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The yellow gas caps started in 05 or 06 so that wouldn't be on the older ones. You'll have to check the VIN's on them.
Old 05-14-2007, 07:20 AM
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I could only find one place that carried it and they said its only 93 octane
They apparently did not know what they were talking about.

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Old 05-14-2007, 07:36 AM
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cool ill check there is no sticker on the window and im at school right now so i cant check the vin but thanks for the information


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