Seven ways to cut your fuel costs (without buying a new car)

You don’t need a new car to spend less on gas. Most of the savings come from how you drive and how you maintain what you already own — and the per-mile math makes the payoff obvious.

Start by knowing your number

Work out your real fuel cost per mile with the cost per mile calculator (price ÷ MPG). Once you know it, every habit below turns into a dollar figure instead of a vague “drive nicer.”

The habits that move the needle

• Ease off the speed. Above about 55–60 mph, aerodynamic drag climbs fast; 75 mph can cost 15–20% more than 65.
• Smooth it out. Hard acceleration and braking waste fuel — anticipate and coast instead.
• Lose the dead weight and the roof box. A loaded roof rack alone can cut highway economy 10–25%.
• Check tire pressure monthly. Underinflated tires add rolling resistance and wear out faster.

Plan the miles you don’t drive

Combine errands into one warm-engine trip (cold starts are thirsty), and price longer drives ahead with the gas cost calculator. The cheapest gallon is the one you never burn.

Then check your real MPG

Track a few tanks with the MPG calculator to see whether the changes are working — and to catch a problem early, since a sudden MPG drop often means a sensor, tire, or brake issue.