My mileage with the stock SL rated passenger tiresNothing worse to affect fuel economy, and performance is tires that weigh over 35 lbs, and are e rated for these gen3 v6 taco's. A fishing buddy had these 40 lb e rated 265 70 16's tires on his 2019 trd....said it killed his gas mileage, and made the transmission hunt like no tomorrow.