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Fuel Saving Tips

Use “Recirculate” setting for A/C in hot weather

In hot weather, your car’s air conditioner works less hard (and saves fuel) if you recirculate the already cooled cabin air, rather than continuously cooling hot outside air before it enters your cabin. Less A/C compressor load equals less fuel consumed. Additionally, this might save fuel by needing/using a lower cabin fan speed. Your car’s engine drives the alternator, which recharges the battery and feeds the car’s electrical load. A lower electrical load equals less fuel consumption.

posted by SteveMak on September 16, 2017

this tip works for 93% of voting Fuelly members.

Don't keep pouring gas in after the pump has auto clicked

Modern cars - for the last 25 years or so have had a charcoal filled evaporation canister attached to the refueling system to capture fuel vapors and prevent them from escaping to the atmosphere. Yes - you can slowly keep pouring gas in after the pump has automatically clicked off as several people on here have said to do...but guess where that gas goes? It's not in the tank. It's overflowing into the evap cannister and will eventually damage your emissions system. Simply put - don't do this. Stop when the pump shuts off.

posted by TheRainman on September 13, 2017

this tip works for 77% of voting Fuelly members.

test your odometer accuracy

Compare your odometer to interstate mile markers. Your speedometer may read 2-3 mph low, but your odometer may be different. Do at least 25 miles, 50 is better. Also odometer error changes over time as tires wear and diameter decreases. Check every 10,000 miles.

posted by edm3rd on September 11, 2017

this tip works for 65% of voting Fuelly members.

white spirit

In a diesel car pour 0,75L bottle of white spirit (uk) into the tank 20-30 miles before filling up (cheapest in Home Bargains). White spirit is virtually the same as Liqui Molly Diesel Purge but for the fraction of the cost. Helps with a rough idle and improves spray pattern of the injectors if they are gummed up.

posted by mnemon81 on September 10, 2017

this tip works for 0% of voting Fuelly members.

Coast to Red

If the light is red the distance ahead, coast instead.............. Drivers (most of us) have the tendency to accelerate to a stop lights. Logically, it doesn't make sense.. but we do it habitually. Rather than waste extra gas to get to the stop light only to waste all of the Kinetic Energy in braking, just relax and coast. The stop light will come soon enough. If you make this a habit, you will discover that often you coast gently into the light turning green and you don't even have to brake! It may bug the person behind you a bit, but you also saved them some gas too :)

posted by SuperCivic02 on August 9, 2017

this tip works for 97% of voting Fuelly members.

Toyota Hybrid Aircon/Heating

* Run the AC fan on the lowest setting you are comfortable with * Change airflow before increasing fan if hot * Change airflow and reduce fan before turning up the heat * Run the AC on max cold and min fan to avoid misting * Set the lowest heat required and wait (unless initially warming the car) * Driving the car warms the heater much faster * Use AUTO with the heater in winter * In summer open the doors to let the warm air out and put the AC on max cold and max fan before getting in. Within 5 minutes the car will be cool

posted by HybridNut on August 8, 2017

this tip works for 36% of voting Fuelly members.

Keep it Cool

Motorcycles depend on movement much more than cars to keep their engines cool (i.e., so they won't overheat and blow up). If a motorcyclist filters through stopped traffic on a highway or uses the shoulder, DON'T GET MAD. They're saving you the inconvenience of a disabled vehicle to move around :-)

posted by uttrombone08 on August 4, 2017

this tip works for 49% of voting Fuelly members.

Is Top Tier Gas worth it? YES!

To reduce the chances of engine problems caused by subpar fuel, always buy fuel from a Top Tier gasoline dealer. Top Tier designation does not make it any more expensive then other brands. For a list of Top Tier fuel locations, follow this link.

posted by dtown40 on July 15, 2017

this tip works for 48% of voting Fuelly members.

Slow down by a few mph on long trips

Try this next time your take a long hwy trip; drive 1-2 mph less than surrounding traffic, and observe that most traffic will pass you by. But because of slower moving vehicles, RV's, semi's, or a nitwit driver who is oblivious to driving with the flow, you'll likely find you'll catch up to all the traffic that passed you by because they had to slow down for the low-speed offender. You'll maintain a steadier speed, gain a few mpg's due to less movement of your right foot (if you're not using CC, which I recommend), have a less stressful drive, and not lose any time to your destination!

posted by jhinsc on May 19, 2017

this tip works for 80% of voting Fuelly members.

Beat the traffic

Drive during off peak times when possible because any car idling in heavy traffic will get 0 MPG!

posted by Jay767 on May 14, 2017

this tip works for 89% of voting Fuelly members.

Yes, DO coast in neutral

Tips say injectors shut off when you coast in gear. True on newer vehicles, but the engine braking will waste more power than the minuscule amount it takes to rotate an engine at idle. Coasting in neutral or pulling in the clutch on a bike is the way to go, unless you want to shut the engine off too which is dangerous in emergency situations.

posted by Hexadecimus on May 11, 2017

this tip works for 26% of voting Fuelly members.

Best fuel consumption during acceleration

This is where bsfc maps for your car come in handy. They show the point of best fuel efficiency during full load. Typically this is between 2000-2500 rpm. So try to give it a good push on the throttle while shifting into higher gear around 2300 rpm till you reach your desired speed. Then get into highest possible gear which gives you a rpm around 1000, cruise and apply all other driving techniques (like feathering)

posted by Varianti on May 10, 2017

this tip works for 46% of voting Fuelly members.

Check your tire pressure.

Check your tire pressure every two fuel ups or every ten degrees of average temperature change. Did you know that tires are one of the biggest factors of good fuel mileage, braking distance and handling? Did you know that 80% of all vehicles on the road have incorrect tire pressure? Check it. A cheap gauge costs $1 but the peace of mind is priceless.

posted by CH2O on May 1, 2017

this tip works for 98% of voting Fuelly members.

Average speed

You might think your average speed on a trip is your highway cruising speed, but your true average speed will be much lower. It takes slow-downs, traffic lights, and pit-stops into account. To increase your average speed, simply stop less often (when possible). This is much more fuel-efficient than the same average speed with short jaunts at 75 mph and multiple slow-downs. I am often passed by people two or three times when they stop for food, other traffic, gas, etc.

posted by jmn20171 on April 21, 2017

this tip works for 88% of voting Fuelly members.

Feather on downhills

Feather the go-pedal on short descents. You will barely use fuel while adding speed and momentum to the upcoming ascent. You can use an instant mpg gauge to ensure minimum consumption (i.e. 99.9 mpg). This doesn't help much if it's relatively flat out there.

posted by jmn20171 on April 21, 2017

this tip works for 80% of voting Fuelly members.

You do you

Don't play "games" with other drivers! Do your own thing, within reason.

posted by jmn20171 on April 21, 2017

this tip works for 77% of voting Fuelly members.

How to drive a CMAX/FFH to get great gas mileage. This explains EV to 15mph and 2 Bar acceleration technique for 2013 and newer FORD CMAX/FFH to get better mpg's. Paul

posted by ptjones on April 19, 2017

this tip works for 0% of voting Fuelly members.

Tip Caution

Some of these tips that users post may save you fuel at the cost of causing more wear and tear to you vehicle that will end up costing more to repair than the fuel it has saved. Example, shutting your car off at stop lights. It will wear out your starter and is hard on the engine in general. Even start stop hybrids have premature engine problems due to shutting off the engine at every stop and they are built for being turned off all the time.

posted by TheEngineer1 on April 11, 2017

this tip works for 77% of voting Fuelly members.

Use Fuelly's "Research Vehicles" before buying a new car

Before buying a new car, consult Fuelly's "Research Vehicles" feature to see what kind of fuel economy current owners are getting in the real world. Do your own due diligence to filter out very obvious outliers, and come to your own conclusions. This info might be more useful to you than an EPA estimated fuel economy number.

posted by SteveMak on April 5, 2017

this tip works for 91% of voting Fuelly members.

Car engine speed at 2200 rpm

Try to keep your engine at 2,200 rpm to get the maximum efficiency. you will get the speed, power and fuel efficiency. Most engine work at max efficiency at 2,200 rpm. Some engine are slightly up and down so try from 2000~2500 rpm and see where are you getting the best fuel mileage.

posted by Alikhaneng on April 3, 2017

this tip works for 20% of voting Fuelly members.

Fueling Up

Fuel up when the temperature is coldest of the day. Usually right before/as the sun comes up. After the automatic stop, wait 20 seconds (40 if you were close to empty) then you will be able to pump about another 1/4 gallon or more. The time you wait allows the fuel vapors to settle a bit, and the vapors are responsible for automatic shutoff in the pump.

posted by KingJr on March 30, 2017

this tip works for 19% of voting Fuelly members.


Read the road and traffic conditions not just right in front of you but also further down the road. Being able to anticipate changes in speed lets you lift off and coast rather than waste energy braking.

posted by pilotmass on March 23, 2017

this tip works for 99% of voting Fuelly members.

partial fill-up's

when gas prices change often, I only buy $20.00 each time until prices are stable.

posted by wizzonit on March 22, 2017

this tip works for 6% of voting Fuelly members.

Drive naked

Take everything out of the car and put it on the driveway. Only put back in what you absolutely need to have for emergencies and this week's chores. Really, you really didn't think I meant take off your clothes, because that would be embarrassing when you got out of the car.

posted by andy92129 on March 17, 2017

this tip works for 75% of voting Fuelly members.

Cruise control keeps same RPM on small inclines

07 Highlander 3.3L, on small inclines/grades, highway cruise control will maintain speed at the same RPM (65mph @ ~2050rpm). This will vary base on engine size eg. smaller engines would more quickly increase rpm in response to small inclines.

posted by chiubacca on March 16, 2017

this tip works for 7% of voting Fuelly members.

Fuel economy misconceptions- Optimal speed for MPG

Ideal MPG speed is definitely 70-80 mph: Nope The only reason you are getting reasonable mileage at 80 mph is because you are ONE car length behind the guy in front of you, that’s it. I see it all the time, don’t try to deny it. Speed vs mpg charts for cars generally show best mpg between 30-45 mph. A semi or RV may achieve best mpg at 55 mph, but don’t expect cars to do the same. Below the ideal speed range you are losing mpg due to reduced engine efficiency, above the ideal speed range, you are losing mpg due to rapidly increasing air drag.

posted by Daschicken on March 15, 2017

this tip works for 65% of voting Fuelly members.

Fuel economy misconceptions- WHEN to use DFCO

You are approaching a stop sign at the bottom of a hill. In this case it would be better to keep it in gear, cut fuel use to zero, and benefit from engine braking. Shifting to neutral in this situation would only increase fuel use. Approaching stop sign quickly. Keep it in gear, utilize the fuel cut. In this situation, putting it in neutral would not slow you down quickly enough to be the efficient choice, and you will also burn fuel idling the engine. Approaching stop sign slowly. Put it into neutral. By using neutral, you can coast longer, which translates to less acceleration needed to travel the same distance, thus saving fuel.

posted by Daschicken on March 15, 2017

this tip works for 41% of voting Fuelly members.

Fuel economy misconceptions- Air filters

Air filters affect fuel economy: Only with carburetors For carbureted engines, yes, fuel injected, no. A clogged air filter will affect acceleration, but not fuel economy on fuel injected engines.

posted by Daschicken on March 15, 2017

this tip works for 46% of voting Fuelly members.

Fuel economy misconceptions- Engine efficiency

Larger engine not working hard is more efficient than small engine working hard: Wrong If this were true, then things such as cylinder deactivation never would have been conceived, as they would REDUCE efficiency by that “logic”. Engines are efficient at converting FUEL to POWER when they are loaded down. As an example, an idling engine doesn’t use much fuel. Sure, but it also produces VERY LITTLE power. The result is a terrible FUEL to POWER ratio. When you load the engine down by asking it to produce power, it consumes more fuel, sure, but it also produces more power. This time, the FUEL to POWER ratio is much better. Look up bsfc maps.

posted by Daschicken on March 15, 2017

this tip works for 60% of voting Fuelly members.

Take your time

If you're on a trip, take your time. Travelling at a slower speed will save you fuel AND get you out of many frustrating traffic situations. Rather than getting stuck behind slow traffic, you will be the "slow" traffic :) If you can skip one stop, you'll more than make up the time you've lost from travelling slower. NOTE: If passing, get it over with and clear the lane. You might burn another tablespoon of fuel, but your improved mood will make the remainder of the trip much easier for you as well as others.

posted by schneidly on March 6, 2017

this tip works for 92% of voting Fuelly members.