Gas mileage for SR5

I noticed my SR5 while running the OE 245s, the speed read ~4mph fast. So, 74 is actually 70mph.

could it be miles per gallon is overestimated with small tires effecting speedometer?

 

I have found the mileage to be getting better as my truck has gotten broken in, was and 22-23 early on and has settled in and 24mpg of late… maybe temp in fall Va summer? Idk but I’m happy with it!

for reference, I drive 40 miles each way to and from work every day, some highway, most of it rolling hills at around 50mph

 

I have 1500 miles on my truck and the average is only 17.2 mpg

 

I’ve had my new 2024 SR5 for almost two weeks. After 1200 miles I get between 24-25 mpg on the interstate at 72 mile per hour. Used to get around 22 mpg on my 2019 on same roads at same speed.

 

best I have gotten at 65 MPH on cruise control is 20.6. I live in Houston and there is no traffic when I head into work so it's not stop and go. On and it's flat like a flat earther prefers the world to be. LOL

 

I’m on my second tank, first average was 24.5 70% highway 80+ mph. The trip computer was spot on to the hand calculated. My current tank is sitting at 23 mpg 50% city. SR5 4x4 long bed.

 

For those not so interested in hyper mile figures...

I average 20-21 mpg self calculating when I fill up. I drive 80 mph on the interstate and put it in sport mode whenever theres not a lot of traffic. (1/3 of the time)

Sometimes on the morning commute the truck will say I got 23-24mpg for the trip.

This is not trying or caring about MPG in a 6MT TRDOR.

If I drove like I had an egg between my foot and the gas pedal, I'm sure I'd get a mile or 3 better but it's just not worth the $5 I'd save.