LogFAQs > #979746845

Giant_Aspirin posted...

for real? the manual does specifically mention "knocking". is that something that will be really obvious?

Putting anything lower than what they say is okay (e.g., lower than 87, or E15+ fuel) will result in knocking or engine damage; though this won't be immediate (it'll take time, and it won't be a one-hit, you're fucked scenario; except for maybe putting E85 fuel in a car that cannot handle ethanol fuel). If you ever find yourself accidentally putting in like 85, and you're scared, you can go into the gas station and buy an octane booster bottle to put into your car. But like I said, you doing this accidentally here and there won't kill your car.

What car is this, anyway?