Fuel economy isn’t mostly about your car — it’s about how you drive it and how you look after it. None of the habits below cost money; several save it immediately. Here are ten that are backed by testing, roughly in order of impact.
For a sense of what is at stake, one tracked Montero Sport burned ₱130,549.62 of diesel in nine months — a real bill, not an estimate. A few percent off that is real money.
1. Drive smoothly — this is the big one
Aggressive driving is the biggest fuel-waster there is. Hard acceleration and braking can lower your mileage by 15–30% at highway speeds and 10–40% in stop-and-go traffic. Anticipate the road, ease onto the accelerator, and coast toward stops instead of charging at them.
2. Ease off the top-end speed
Most cars are most efficient at roughly 35–55 mph (about 55–90 km/h). Above that, aerodynamic drag climbs sharply, so every extra 10 mph on the motorway costs you noticeably more fuel. Slowing down a little on long runs is free mileage.
3. Keep your tyres properly inflated
Under-inflated tyres drag. Mileage falls about 0.2% for every 1 PSI they’re low (across all four), and keeping them at spec can improve economy by up to ~3%. Check them monthly and before long trips — our guide to tyre care covers pressure and wear in detail.
4. Don’t idle
Idling burns fuel to go nowhere — literally zero miles per gallon. If you’ll be stopped for more than 30–60 seconds and you’re not in traffic, switch the engine off. Modern restarts use less fuel than sustained idling.
5. Use cruise control on the highway
A steady speed is an efficient speed. On flat, open roads, cruise control holds a constant pace better than your right foot and avoids the small accelerate-brake cycles that waste fuel.
6. Lose the dead weight
Extra mass makes the engine work harder. Clear out the boot, and take off roof racks or boxes when you’re not using them — a loaded roof rack adds big aerodynamic drag and can hammer economy at speed.
7. Combine trips
A warm engine is far more efficient than a cold one. Several short cold-start trips use more fuel than one longer trip covering the same distance, so batch your errands where you can.
8. Go easy on the air conditioning
At low speeds, A/C noticeably increases fuel use. At high speed the trade-off flips (open windows add drag), but around town, using it only when you need it helps.
9. Keep up with maintenance
A neglected car sips more fuel. A clogged air filter, worn spark plugs, the wrong oil, or a dragging brake all cost economy — which is why a simple maintenance schedule pays for itself at the pump. Set service reminders and you’ll catch these before they add up.
10. Actually measure it
You can’t improve what you don’t track. The habits above each help a little; together they add up — but only if you can see the trend. Log every fill-up, watch your km/L (or MPG) over time, and you’ll spot both good habits paying off and problems (a drop in economy often signals tyres, a sensor, or a service due). Our guide on how to track fuel economy shows the simple method.
How Kotselog helps
Kotselog turns fill-ups into a running picture of your real mileage and fuel cost — so you can tell whether that lighter foot is actually working, and get nudged when a service is due. See the fuel & mileage feature, or open the app and log your next fill-up.
Savings figures are approximate and depend on your car, load, and conditions — treat them as guidance, not guarantees.
Frequently asked questions
What driving habit saves the most fuel?
Driving smoothly. Hard acceleration and braking can cut mileage by 15–30% at highway speeds and 10–40% in stop-and-go traffic, so easing off is the single biggest lever most drivers have.
Does tyre pressure really affect fuel economy?
Yes. Under-inflated tyres raise rolling resistance — mileage drops about 0.2% for every 1 PSI low across all tyres. Keeping them at the recommended pressure can improve economy by up to about 3%.
Should I turn the engine off at stops?
If you'll be stopped more than 30–60 seconds (outside of moving traffic), yes. A modern engine uses less fuel to restart than it does idling — and while idling you're getting zero miles per gallon.
How Kotselog helps: Log fill-ups in seconds and see your real mileage — km/L or MPG — over time. See the fuel economy feature →
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