Gas mileage 2009 5.7

My local gas station sell premim gas at a great price, I was going on vacation all highway miles so I said what the heck I'll give it a try, got 440 miles before refilling, maybe could of gotten 25 miles more but wasn't to sure where next gas station was.

 

Must be bone stock on a 38 gallon tank. I don't think i've ever hit 300 miles with mine.

 

On regular gas I usally get 300 -320 miles per tank to my hunting camp ,highway miles, was totally blown away when I put in the high test.

Give it a try on next long trip

 

My best mpg has been 17, that equates to 442 miles on 26 gallons. (all highway) I have seen 340 on 20 gallons which was that 17mpg as I don't let my tank get to empty.

 

Yall Tundras must've skipped leg days, i'm on 35's and lifted 3" so that kills my gas mileage, that and i drive like a douche.

 

Completely empty truck at 70 mph on flat Texas highway will net me 20 mpg.

Towing my 3500lb travel trailer gets me 11 mpg. But I don't stop until I hit 0 miles range, as that means I have 5 gallons (55 miles) left in reality. So I get over 230 miles to a tank even when towing.

 

Thanksgiving 2017:

I put 1200+ miles on the RCSB for Thanksgiving... not a single hick-up, and I averaged 16 to 19 MPG depending on speed. 19 MPG under 75MPH, 16 MPG above 75 MPH (sustained average highway speeds). Press your right foot to the floor while cruising @ 70 mph and the truck comes alive. Right now, the harmonic sweet-spot for this truck the way I have it set up is a little above 80 MPH.



That trip was on 32" Michelin tires, before I installed shorter tires and DAPtized my 5.7L

 

so what are you getting cause do too.
drive like an ash.
i'm on 33 and if i get 12 mpg on the hiway i'm dancing in the streets

 

No matter how hard i try to save it, i get 250 miles before the gas light comes on. 70% hwy 30% city