The price of 87 octane here is presently about $2.50 a gallon ... turbocharged EcoBoost engine on the most severe EPA regulated cycle (US06). But that high-speed cycle makes up less than 20 ...

Prices for their 88 octane gas, known as UNL88, will be set at $3.99 a gallon through July 4th and their e85 gas will also be at a lowered price. Yet, not every car will be able to run on the new gas.

Called the B6.7 Octane, Cummins' first gas engine is a turbocharged 6.7-liter inline-six that runs on 87-octane gasoline. Output ranges from 200 horsepower and 600 pound-feet of torque to 300 hp ...

If you've ever fueled up in Colorado, you might have noticed something unusual about the gas octane ratings at the pump -- specifically, the availability of 85-octane gasoline. This lower octane ...