So I'm trying to find a definitive answer to a dilemma concerning tires size and gas mileage. Which tire below will give more MPG with normal usage? Does thickness or size have more to do with hurting your gas mileage? Please be specific about this which does what and which affects it more. Most AT tires have much stronger side wall protection than "P" passenger rated tires but does this specifically affect the MPG from the larger weight? Would a p265/75/16 or a LT265/75/16 give better gas mileage? It may only be a small amount but I'm trying to get an answer on this once a for all.
Pic below of the two tires in question.
Goodyear Wrangler DuraTrac LT265/75-16 Tire
P265/75R16 BF Goodrich Rugged Trail