Compression Ignition Addict
Join Date: Nov 2006
Location: Mesa, Az
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I have found that with my chip on econo I will get the same milage as stock. But I like the power, so I spend more time in tow or extreme.
As for the exhaust, I gained about 2 mpg on avarege just by deleting my cat and going to a 3" downpipe.
All in all, I'm now at about 17 MPG depending on what I'm doing. If I hit the highway without towing, and I keep the speedo at 65ish, I can milk 20 MPG out of it.
As for hard evidence, All I have is my calculations at the pump.
Jody in Mesa,Az
97' crew cab xlt, F350
2 wheel Drive
3 gauge pillar(egt,boost,trannytemp)
3" down pipe
Tranny Rebuid ( 3 disk TQ, extra clutches, all billet steal internal parts, New HD Valve Body, 45,000 BTU cooler)
37' Avion 5th Wheel