Quote:
Originally Posted by fordman00
I see.my tires are bfg all terrain ta k/o.I know it has potential.lol.just have to work out the kinks and things.
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What size are the current tires?
I agree with the post above about larger and/or more aggressive tires causing a drop in fuel economy, and combined with lift is even worse. But part of that is also because the odometer is now off and you are getting a lower than actual miles reading on the odo (assuming odo/speedo has not been corrected).
For an example, going from a stockish 265/75R16 to a 35ish" tire nets around a 9% difference in distance travelled per revolution of the tire and thus the odo will show 9% less miles. So if you fill up with 20 gallons of fuel and the odo says 250 miles that is 12.5 MPG, however you actually traveled around 272 miles so the corrected MPG would be 13.6. Then include the added rolling resistance, rolling mass, and increased aerodynamic drag for another 1-2 MPG hit.
On my gas 6.0L Chevy 2500HD going from the stock street 245/75R16 to 285/75R16 BFG AT cost me about 1-1.5 MPG with a corrected odo.