3. Improvised Gas-Cap
Estimated New Cost: $78–$83*;
Estimated DIY Cost: $4.12*
The cost of a blank CD is $0.33, and a roll of Scotch tape costs $3.79, so the total cost of this do-it-yourself project is just over $4. Purchasing a new gas tank lid would cost between $78 and $83, so this is a more cost-effective option.

DIY Gas Cap via Anna Boudova on Pinterest
Your gas tank lid may be ripped off with remarkable ease. It also doesn’t require you to be the Hulk. Some of us—the same ones who leave their wallet and cup of coffee on the car’s hood—know that all it takes is opening the lid accidentally and then veering too close to the corner. Then, suddenly, the gas tank cover vanished.
