Almost all gasoline today includes the additive ethanol, which is added to fuel to oxygenate it and reduce air pollution. When choosing gasoline at the pump, you may be given a choice between gasoline rated E10 (which is 10 percent ethanol) and E15 (15 percent ethanol). To protect your car, Popular Mechanics suggests avoiding gas rated E15 if your car was manufactured before 2001. Ethanol is an alcohol, and it can be corrosive to rubber and certain metals, and many vital parts of cars are made from those materials. Cars made after 2007 are compatible with the E15 blend because automakers adapted the newer cars for the higher grade of ethanol gas.

Planning to take a road trip this summer? While it may seem kinder to the planet to roll down the windows when driving at fast speeds on the highway, it's actually a fuel-efficiency nightmare. Opening windows or the sunroof reduces the car's aerodynamic design, creating drag and lowering your average miles per gallon. Instead, stay cool by taking advantage of your car's air conditioner, which is designed to work with your car and keep you comfortable and your car as fuel-efficient as possible.

It seems any household with children has the inevitable box of worn-out, broken and unwanted crayons. Instead of throwing them out, why not put them to good use by sending them to the company Crazy Crayons? The company, which you can find at CrazyCrayons.com, employs people with developmental disabilities and gives them a job taking old crayons and making them into fun new coloring products. Over 100,000 pounds of old crayons have been made into new shapes, like stars, puzzles and more. All you have to do is box up your old crayons and send them in, and the company does the rest to turn your trash into treasure.