Bad Gas Mileage?
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Senior User
Joined: Apr 2006
Posts: 339
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From: Savannah, GA
Bad Gas Mileage?
I got an estimate of my gas mileage, I'm getting 10.36 mpg. Is this bad for a 300, 1bbl, C6?. The air filters clean, put new spark plugs in it when I did an oil change about 300 miles ago.
What else can I do to achieve better gas mileage?
What else can I do to achieve better gas mileage?
Elder User
Joined: Mar 2006
Posts: 901
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From: North-Eastern, Ohio
Well for starters, if you keep your foot out of it, you should get better mileage. A vacuume gauge should help tell you when you are over-doing the gas. Are you running wide tires? The ideal tire is a tall, skinny tire (make sure you get your speedometer recalibrated if you do to help make your MPG accurate). I have an '91 F-150 with a 4.9L 5-speed and I get 13mpg. But that's when I haul 1.5 ton of gravel in the bed while towing a 4 ton cow trailer.
Postmaster
Joined: Apr 2000
Posts: 3,890
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From: La Verne, California
Cheque your Timing both Engine & Distributor, Carb. Needs Rebulding,Trans Slipage, Dragging Brakes, Clogged Exhaust Pipe/Muffler/Cat.
1st & fore most make this Engine Breathe, Install an Offenhauser "DP" Intake w/ a Holley 390, Melling Torque Cam, 2-into-2 Header.
1st & fore most make this Engine Breathe, Install an Offenhauser "DP" Intake w/ a Holley 390, Melling Torque Cam, 2-into-2 Header.
Fleet Owner
Joined: Sep 2005
Posts: 28,609
Likes: 18
From: Lake Tahoe, Nevada
Take a look at this thread, discussing gas milage. Check out posts 25-27
https://www.ford-trucks.com/forums/s...ilage+possible
We were talking about a 390 at that time, but the principles apply all around.
https://www.ford-trucks.com/forums/s...ilage+possible
We were talking about a 390 at that time, but the principles apply all around.
Thread Starter
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Senior User
Joined: Apr 2006
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From: Savannah, GA
I think for the time being (Two or Three weeks when I have some paychecks saved) I'll go ahead and buy new headers, and let it breathe a little better. I'll go and get a Vacum gauge whenever I can and intall that.
Junior User
Joined: Mar 2006
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wouldnt the EFI manifolds help too..i have a question about those too...what side LH or RH do i use on my 300?
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Fleet Owner
Joined: Sep 2005
Posts: 28,609
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From: Lake Tahoe, Nevada
Originally Posted by 1983_f100
wouldnt the EFI manifolds help too..i have a question about those too...what side LH or RH do i use on my 300?
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Thread Starter
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Senior User
Joined: Apr 2006
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From: Savannah, GA
Just had to take my truck to the shop. Somethings wrong with the carb and I couldn't figure it out....Four month old carb, let my mom borrow the truck yesturday/today, comes back dying at ever stop, gulping gas and not wanting to start.