Compression Ignition Addict
Join Date: Oct 2009
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Yes, I'm tuned and deleted. With that being said, I know other guys that do better, but I pull a 13k 35 ft goose neck and am lifted 6" with 37" mud terrains and still get10 MPG hand calculated. You can't trust the lie-o-meter too much. You're probably getting worse. Mines is usually 3-4 MPG high from what I'm actually getting.
So, yes, to get much better mileage and performance you should be tuned and deleted. And agreeing with the above post, strong winds can make a huge difference when your essentially driving a big sail.
Check out the performance section. There are a lot of good reads. And welcome to the forum.
08 F450 CCLB 4.30's
Spartan, Pure Performance Custom 3", Toyo M608Z, MBRP, FloPro, Banks, Volant, Mishimoto, Dieselsite, LineX, Reese 30k