Those seeking a high-mileage alternative fuel car for sheer frugality might want to consider models like the diesel-powered 42-mpg Volkswagen Golf TDI or the 43-mpg Honda Insight hybrid.

After they're dissolved, VP Racing Fuel System Treatment's detergents clean your entire fuel system as well as your piston tops, rings, and valves. One bottle treats up to 20 gallons of fuel and ...

Over time and miles, your car might start to slow down. It might not accelerate as quickly as it once did; the engine may not run as smoothly as you remember, or the fuel economy may dip—but ...

Delivering the Fuel The main ingredients in the system center around the two electric fuel pumps. The first is a 340-lph pump submerged in the custom Behind Bars Race Cars fuel tank.

This fluid is manufactured with jet fuel and concentrated fuel detergents that get rid of deposits, so it’s sure to do its job. The second option is to go for fuel solvents. It is much stronger than ...

E15 gas has been certified for sale in the U.S., and is slowly beginning to show up at gas stations. Here’s a quick rundown of what you need to know.