I was wondering if mixing 89 and 93 was ok for my car....I try to run 93 as much as i can but when i dont have cash on me i run by another gas station who keeps a tab for me that i only pay for every friday,and he only has 89.Does it hurt the car to do that???

 

Mixing the 89 and 93 will give around a 90-91. It should be fine. Do you hear detonation ever? I would not spray with less than 93 though.

 

yeah ill do that but the spray wont be hooked up until next saturday