Gas mileage at high speeds?
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Joined: Feb 2003
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From: Oklahoma City, OK
Gas mileage at high speeds?
I have an 88 GTA with the 350 TPI. Today I took a little road trip which was 207 miles round trip. I filled up to the brim right before I left and hit the highway and cruised around 85 to 90 mph the whole way there and back. By the time I got back, I was burning fumes. Is this normal for going fast like this? My RPM's were around 3,000. I have the automatic tranny too. Thanks for any info! Matt
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Joined: Sep 2002
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From: Elk Grove Village, IL
Car: 1989 TransAm GTA
Engine: One sweet modified 355 TPI.
Transmission: The kind that shifts....
Even when my mileage suffers cause I'm playing with the gas I still average about 300 miles on a highway trip. But I also have a VERY large gas tank it seems.
The one time I ran it down to fumes, I was gettings serious fuel starvation in light turns. When I filled up it took 19.5 gallons
Now, I don't know of any factory gas tank holding that much, so wow. I don't think my gas tank is stock.
The one time I ran it down to fumes, I was gettings serious fuel starvation in light turns. When I filled up it took 19.5 gallons
Now, I don't know of any factory gas tank holding that much, so wow. I don't think my gas tank is stock.
Last edited by FruityOne; Nov 14, 2003 at 06:30 PM.
Joined: Oct 2001
Posts: 12,221
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From: Il
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: Gas mileage at high speeds?
The tanks are 15.5 gallons give or take. I've heard of early 12 gallon tanks or so but never seen one.
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