3/2 level on 275/70r18 tires MPG change?

Trying to out weigh all my options I know this is probably a recycled/dumb question but I’m curious how going from stock tires to a 3/2” level on 275/70r18 tires effected the MPG, I know we don’t buy a 5.7 V8 for that,but again just trying to look at all options before pulling the trigger, if it’s 1MPG loss I’m all for it!, thanks in advance.

Cheers!

 

Well, I have 275/70s, no lift, and took at hit of 1.5-2mpg just changing the stock TRD OR michelin ATs 275/65 and moving to E rated Cooper XLTs. You can count on about 2MPG less.

 

Changing your ride height/level will affect you less than changing your tire weight and tread. Would be beneficial to know what tires you have currently and you can also look up the weight difference in tire size if you know what brand you want.