What kind of MPG do you get?
12-07-2006, 03:25 PM
#1
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What kind of MPG do you get?
I have an 82 automatic I just got 200miles ago and MPG seems OK but I have not checked it being most driving was city. 1982 Car and driver says 12mpg but they also say my 04 GTO gets 18 when I get about 25+ on highway. I know it will differ but what are people getting with each model, stick vs auto? Hwy and mixed? Also what grade fuel do you run? I am running 93 octane but manual states 87...is that right?
78-82 mpg?
83-86
86.5-89
etc.
78-82 mpg?
83-86
86.5-89
etc.
12-07-2006, 03:30 PM
#2
Supercharged
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I used to have an 82. Mostly city driving i got about 14MPG and I only used 87 octane! My supercharged GT gets about 11MPG city and I use 93 octane. 
12-07-2006, 03:32 PM
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As long as I keep my foot out of it I can get around 18 MPG on average. Putting my foot into it, with the blower on full tilt, I can get into the low single digits..... (even though the digital read out is lying to me...... I am running 30# injectors) I burn 93 or better..........moonshine if I can get it......
And one set of uniroyal tires.
12-07-2006, 03:50 PM
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Run ONLY as high as the car is designed for. In your case running 93 is a complete waste of money. Higher Octane rated fuel is NOT better,more powerful ,cleaner it simply explodes slower....
12-07-2006, 03:57 PM
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At 6psi my 81 averages about 11-14mpg on my daily commute - I run 93 octane. Without the blower I never ran anything higher than 87 octane.
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12-07-2006, 03:57 PM
#8
Three Wheelin'
I filled up two days ago and got 15.7 MPG on that tank. That is 50 / 50 city / highway and every time that I drive, I test to make sure that I am seeing full boost under WOT. 
12-07-2006, 04:03 PM
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Originally Posted by Cameron
... and every time that I drive, I test to make sure that I am seeing full boost under WOT.
12-07-2006, 04:13 PM
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I get around 19-20 if keeping it below 80ish. Car is a 1987 S4 Auto with approx 88k. Mods include advanced cams (slightly), no air pump, no cats, RMB. I also have slightly increased stall speed. Will power brake to approx. 2200 rpm. This affected gas mileage only slightly. Converter tightens up quickly once under way (at hwy speed).
12-07-2006, 04:41 PM
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4 to 5 mpg at Road America in Ronn's GT racecar.
12-07-2006, 04:45 PM
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Originally Posted by Andrew Olson
Yeah... I do that too!
