Jump to content

New lift, gas mileage went to hell.

DrDaveMD89
 Share

Recommended Posts

DrDaveMD89 Enthusiast

DrDaveMD89

Posted
Posted (edited)

Hey all,

 

I recently had a 7.5in vertex lift installed on my 2011 Silverado by a very reputable shop. Truck looks awesome but my mpgs took a major hit. Only fill up with premium. I know trucks aren’t known for stellar gas mileage but going from 15/18 to ~11 mpg is a killer.
 

Truck specs:

- 5.3L with Diablo afm disabler used to prevent oil consumption (it works).

- 18x8.5 in wheels with 275/65 duratracs (nitrogen inflated). 2in spacers all around.

- K&N air filter.

- new plugs and wires with ~30k miles on them.

- flowmaster super 44 dual exhaust.

 

I’ve cleaned the throttle body and MAF. Hooked up my obd II and no codes. 

Other than removing the lift what can I do?

 

Thanks in advance!

0DBF3778-53BF-4D0E-B166-071ACD8B4102.jpeg

C20958DA-2B5C-428C-984B-AD01D65E7E3B.jpeg

38A97CF8-08E7-470F-8A29-DFF61F08EBD7.jpeg

Edited by DrDaveMD89
Z45 Senior Enthusiast

Z45

Posted
Posted (edited)

Well you changed the aerodynamics of the truck and is going to impact mileage. Also with louder exhaust there is a good chance you are driving differently than normal.  I have yet to see anyone with a loud exhaust drive normal.  My neighbor seems to have to gun it every time so that's dipping into his fuel economy,  bet you do the same??

Edited by elcamino
DrDaveMD89 Enthusiast

DrDaveMD89

Posted
  • Author
Posted

I know those type of guys- I’m. It that type, with my daughter and other kids playing in the neighborhood I’m very mindful of my speed. I enjoy that low idling grumble.

I don’t need to be the first one off the line and try to avoid hard stop. 

Grumpy Bear Senior Enthusiast

Grumpy Bear

Posted
Posted
8 hours ago, DrDaveMD89 said:

Other than removing the lift what can I do?

 

Nail the alignment than install a Linear Logic Scan Gauge II to monitor your driving habits and drive like it's a 10 ton dump truck overloaded  in a school zone and a DOT cop watching; and you have no brakes. That should get you about 2 mpg back. then make it a lifestyle. 😉 

 

That's not me being funny. 2 mph is nearly 20% from where you are. You will be shocked if you monitor yourself and on dozen silly little things you do that hurt mileage. Easy to correct things that will not neuter your manliness. If you measure it, you can correct it....right? The truck silly...........measure the truck........:crackup:

 

Iowa, eh? We're neighbors. It is a pretty truck though.... Not being a huge fan of lifted that is a major compliment...

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Latest Articles

  • Posts

    • txab
      Gas Prices

      By txab · Posted

      Still $3.01 with even more places at this price
    • BCGM
      Recalls 2024 Chevrolet HD

      By BCGM · Posted

      JW2024 and Others is this site for Oshawa built Trucks as well ? Thank You !
    • BCGM
      Remote Start Noise 2024 2500 HD Gas

      By BCGM · Posted

      Thanks JR that would be great if you could do that !!! Do you have a link to where this was discussed before ? I cant seem to find it  Thank You Again !
    • Another JR
      Remote Start Noise 2024 2500 HD Gas

      By Another JR · Posted

      Oil pump noise was discussed before.  I will try to remember to record a remote start later this morning. 
    • Chuck FB
      MPG at 600 miles

      By Chuck FB · Posted

      There are probably a few threads talking about fuel mileage but this one seemed to fit the stats I have seen based on my typical local driven route but with different outcomes based on different seasons/temperatures. I have a few hundred pounds of items that consistently ride on the truck at all times such as a bak flip cover, rubber bed mat, tools and extra fuel so I would be something over 8100 lb without me in the truck. All these examples are based on a 100 mile round trip to a town plus running around town so maybe 110 to 120 miles in total for a trip. Using regular fuel and I assume it always has some ethanol in it but don't know the percentage they blend in. Also speed wise I am going at 62 mph and non aggressive driving although less speed yet if its crappy winter condition roads. I am going by an initial reset of the computer generated fuel use numbers averaged over a couple of thousand miles or so for each weather/season so they may be more optimistic then actual hand calculated numbers. Basically this is painting a picture of doing the same drive but seasonal conditions and temperature being the major variable to the end result. Oh and although I am in Alberta Canada, I am converting it to miles per US gallon so there is no confusion.    So winter time it gets cold here, no real surprise there and the roads can be clear at times but also often have packed rough snow or are are driving through loose snow ( they do a poor job of plowing the highways ) and yes this includes the extra idle engine time due to trying not to freeze ones butt off. 12.7 mpg is what I was getting during the winter months on average.    Then during the spring when it was around the freezing point and the highways are clear of snow, I was getting around 14.25 mpg.   Summer time, I have been getting around 15.15 on average but certainly some of the trips showed quite a bit better fuel mileage, so much depended on how much or little I had driven around town and number of engine restarts after sitting for a while at each location. But stating a best fuel mileage trip to town pretending that is what the truck gets on average is fooling ones self for sure !.      As I said in a different post, I had driven a 645 mile trip over a couple of days stint to a different destination then these other daily to town examples above, and was done during the summer with nice weather and not bucking a head wind, also keeping at 62 mph and its a rolling landscape type highway drive ( this isn't southern Alberta or Saskatchewan flat lands ) Hand calculated fuel mileage in this case though and it came out to 17.65

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...