I have a MAzda 3 witha 2.3L gas engine 160hp/155 ft/lb torque at the crank. (MTX) Drivine exlusively in arizona/nevada environments (rarely below freezing temps even at night). I drive it pretty hard and was wondering what kind of oil I should use? Manufacturer recommends 5w-20 but I was wondering if there is something that can protect as well as woirk better than Mobil 1? Thanks.