But what gives it that 87 rating is a word you've probably heard a time or two: Ethanol. Regular 87 octane gasoline in the U.S. contains about 10% of it. This renewable biofuel (made mainly from ...

Car experts at Admiral car insurance urged some road users to "avoid premium unleaded" if they want to boost their fuel economy.

More importantly, you will also learn how to select the fuel with the optimum octane rating for your car, so you can extract the best possible performance from it. Let us also say at the outset ...

Generally speaking, most modern cars that run on 95 octane fuel today will run on 95 octane E10 fuel tomorrow without the slightest hiccup. As we said before, sensors will figure out the quality ...

Yes, E10 is the standard 95 octane petrol grade sold at petrol stations across England, Scotland and Wales. Premium or super unleaded will have an octane grade of 97 upwards. Is it okay to mix E10 ...

If your old car’s engine is knocking, high-octane fuel can help fix the problem. Flex-fuel is a specific blend of gas and ethanol, a plant-based fuel typically made from corn. Also known as E85, ...

Ethanol fuel came about as a response to oil shortages ... In addition, E85 has an octane rating of about 110, higher than the 93 octane of premium fuel. That means the fuel can better resist ...

You might have noticed that some gas stations occasionally offer specials on unleaded 88 octane gas—also known as E15—which contains 15 percent ethanol. Ethanol is an alcohol that’s derived ...

Just about every gas station has a choice of regular, mid-grade, and premium fuels. So what is the benefit of the more ...