2011 yukon xl 20" 305's and 2" levle kit gas mileage droped huge?

[jbru167]

Just intalled Airaid and ordered BB AUto Cal tuner. HOpe to make up some of the loss. On the fence about the exhasut making any MPG gains. Lenaing towards muffler and maybe tips any suggestions?

 

[Zed 71]

You need to get your speedo corrected which will correct the odometer. You probably lost about 1.5-2mpg with the leveling/tires.

Leveling it makes it less aero-dynamic so I could see how the you could lose MPG's from that in itself... get a BB Tune and you can get the speedo issue fixed in two seconds!

^ this

I "lost" about the same with level kit and heavy MT tires. Speedo corrected through BB tune brought it back near stock.

 

[jbru167]

BB on its way hope to get it dialed in soon. ZED71 do you have full magnaflow system or just muffler?