Car engineers spend a lot of time engineering pounds, ounces and grams out of today’s cars. Don’t undo their efforts (and the gas savings they represent) by leaving anything unnecessary in the luggage compartment. Golf clubs are a common violator, but so is random dead weight like those items slated to go to the second-hand store one of these days. Or, dear lord, a case of individual water bottles for after-workout hydration.
Every time you accelerate, you’re using gas to get that stuff up to speed with you. How much more? This depends on your car, but the EPA estimates a 1% reduction per 100 pounds. On a per-gallon cost basis, that’s about $0.03, using the EPA baseline figures. Get your stuff in order and you’ll save money, too.