Are mechanics stupid or its me?

yeah like on my dad's tl-s the dealer said it takes 91, but it's able to adjust itself if you wanna put 87 in, but you won't benefit from the full potential of the power.

my h22 is a 94, and OBD1, so it only runs safely on 91, so i don't mess around with that.

sur ma chevy j peut pas tinker avec autre chose que du 91.
autrement sa buck. j ai pas d ordi non plus