Forgetting the names, you're sure to encounter numbers like 87, 89, 91, and 93 written ... to select the fuel with the ...

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 ...

You see all the options of gas at the pump every time you fill up but what is the difference between the octanes? Sure, premium costs a little more than regular gas, but is premium any better for your ...