Bad mpg

Could be, but you would be throwing codes

 

A lot of factors here. Aftermarket wheel can be very heavy also the load range on your tires play a factor like E are a heavy ass tire. Driving habbits and city vs highway. I would start with regular maintenance like diff fluids and injector cleaning. Also make sure your rear brakes are adjusted properly. You could check your o2 sensors and cats as well.

 

Are the brakes dragging

 

*breaks

 

Damn auto correct

 

I hear a rattle some times that kinda makes me think it’s the cats

 

I don’t think they are dragging

 

Maybe a large set of truck nuts hanging off the back

 

I think of you put a K&N sticker on it you will be good to go.

 

I have a similar Truck. 6 speed on dirty fives with 4.56 gearing and was dealing with slowly decreasing MPG's for a while.

For me it turned out to be the O2's (they went at around 100k / maintenance item).

Changed those and it went back to 11-12........

 

If he puts a fan club sticker on, he'll get unicorn power

 

Can I get one?

 

@Gunshot-6A

 

6 to 7 mpg there is something grossly wrong. The 33’s and lift will reduce mpg but not reducing it to 6 to 7 mpg. It could be any number of things causing this. Don’t know enough about your truck to diagnose it. Have you computed the mpg more than once with the same results? I suggest you take the truck out on a fairly level highway, drive it for an hour not exceeding 70 mph and see what you get. I have a feeling it’s due to a combination of the lift, 33’s, your driving habits and where you are driving (city stop and go, hilly area etc.)
Also the tall tires affect your odometer and will register fewer miles than you actually travel which will give you a false mpg number.

 

Yes same results last 3 tanks of gas 6-7 mpg

 

PM me.

 

Can confirm. I watched this insult to the 2 "superbros" Majestic.

 

What brand of gas? I get crummy mileage at some stations (sheetz mainly) and great mileage at others (BP). Only 2-4 mpg difference though.

 

Are you adjusting your odometer for the larger tire when doing your mpg calculations. With larger tires your odometer is understating distance travel. Recommend the fluid changes too- go to a good synthetic Redline- royal purple- amsoil. Help reduce the friction loss through the tranny, x case, diffs. Won’t move the needle much but when you fighting retain mpg it all begins to stack up to measurable improvements. Air pressure- replace that o2, clean the maf sensor, check the plugs again. Report back let’s us know if you got some improvements.