I just came back after an extensive trip with the family with plenty of cargo and averaged about 23.4 mpg with a/c blasting continously doing about 80-90 mpg,tried sticking with Shell 93 octane for most parts of the trip until i ran into a Chevron gas station which had 93 octane with techron,after initial fillup noticed my rpm gauge was acting erratic at idle and honestly had me a bit worried because being so far and hot out in the lovely state of Georgia,but for the most part did not think to much of it until my butt dyno went into over drive with the slightest touch of the gas pedal which definetly was a good thing,especially with all the stress and heat soak on the engine with continual driving,so for the next few hunded miles only used Chevron and definetly saw an increase in performance and wish it was available im my area,so for anyone that has access to Chevron would definetly recommend it. Z