better to run stock or 87 tune?

[apollo18]

i have a bullydog tuner for my truck, and its already has like 300k km on it, its a 2007 escalade with 6.2L so im wondering if the bullydog mpg tune or the 87 tune is better then stock? im just looking for longetivity and such, i dont really care for performance or fuel savings

[BlackBearPerf]

We can not say what the Bullydog will do for your truck, but you definitely want to run 91+ octane for that vehicle.