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Old 09-08-2012, 02:39 PM   #9 (permalink)
Sven7
Master EcoModder
 
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Join Date: Aug 2011
Location: Warren, MI
Posts: 2,456

Boo Radley - '65 Ford F100
90 day: 13.28 mpg (US)
Thanks: 782
Thanked 664 Times in 407 Posts
I'll try to dig out the paperwork aerohead sent me. I don't recall it being more than 5 or 10%. Check back tonight.

Don't expect quick fixes to get you much over 10% either. With something like an old F-150 you'll be lucky to break 20mpg without major mods. For only 250 miles, drive behind a semi. Look at my Rabbit gas log- from normal driving habits to a slipstreamed highway trip I added 12.5% MPG. In a truck that's 2mpg if you're lucky. Like $8 savings.

Let's say your time is worth only $10 an hour... is making something complicated really worth it?
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