How high of an octane does your car actually need to run well? Here's what to know about the consequences of using the wrong ...

Is it necessary to use premium 91 octane gas or can I safely use regular 87 ... At this point, the best thing you can do is leave it with your mechanic overnight, and if necessary, several nights ...

The more long-winded version suggests that manufacturers recommend premium fuel for a reason; namely that an engine is specifically designed to function best when ... Whereas 93 octane is the ...