Having trouble with my mpg

I'm recently getting 14 to high 15 mpg on my yota. I can't figure out why. Anyone else have trouble. I'm driving same speed as I have been for a year. I went from 18 mpg normal hgwy to now this. It's bothering me.

 

Buy a Prius

 

Lol.

 

You're using diesel, right?

 

Not falling for thst.... Again

 

Ever since I got OR tires, a rack and RTT, and some armor, my mileage went down too...

But really- what have you done to it since you driven it off the lot? Some will also point out that winter blend vs summer blend fuel makes a difference, too.

Welcome!

 

Yeah, I put on an afe combo cold air intake kit and it went up a tad bit. Then put stock size OR tires. Was good for a week and just got worse. I'm driving lots of miles for work so it's annoying me. I'm almost ready to get different rims and regular tires. Just for the summer and fall then put these on in the winter.

 

You do understand this car is as aerodynamic as a brick, right?

 

Being a sport and if you still have your spoiler below if you didn't go up in tire size or get heavier more real aggressive tread I would see no reason why it should drop 3 mpg. is this hand calculated? If your tires size is bigger you have to account for that in your math also if not calibrated

 

truck