with the engines in these vehicles and operating with a light load you will not see much improvement in any way with the 93 octane. If your towing /hauling then the 93 octane does help with reducing knock which will reduce timing and cause low MPG/power. if you do a MPG test to compare the MPG between the two octanes also the increased cost of the 93 octane you will find the 93 costs more per mile than the 87 . some brands have detergents some do not. 93 octane of some no name brand does not mean it has any cleaners in it or burns cleaner. the engines are designed to burn clean with the OEM 87 octane fuel . if not then you fail the emission test/check engine light on. with any tuners/pcm tweaking 93 octane will make the engine run stronger but you have changed the PCM programing to run on the 93 octane. I run 87 unless I plan on towing my 4,000lb boat then 93 is used. the only place I could find non ethanol fuel was in Oregon state. perhaps Canada.