Some misconceptions about fuel-saving
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Joined: Dec 2020
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From: Georgia
Some misconceptions about fuel-saving
Here are some misconceptions about fuel saving that I think many people still believe in. Hope this post is going to be helpful for you 
1. Manual transmission car is more fuel-efficient than automatic transmission.
In fact, automatic gears are equipped with advanced technology that helps reduce fuel consumption by as much or even more fuel-efficient than manual transmission.
2. Starting a car consumes more fuel than leaving a car running with no load.
In many situations, you should turn the engine off and restart instead of allowing the engine to run for too long. Depending on the engine capacity, non-loaded vehicles usually consume about 1 to 2 liters of gasoline per hour. If you're just stopping at the red light or a little traffic jam, it's not necessary to turn off the engine.
But If you're going to stop the car longer, I recommend you to turn it off.
(This is true for not only Mazda but other cars)
3. Warm up the engine before departure.
This concept is out of date because today's cars can roll out just after a few seconds of start-up.
4. The older the car, the more fuel it consumes.
This is not the case if your old car remains in good time and properly maintained. A 10-to 15-year-old car may have the same fuel consumption as a new car. One important thing to focus on here is how you keep that car going.
5. Change the air filter could help save fuel.
This is also an old concept from the time when cars were still using a carburetor.
Replacing the dirty air filter will not improve fuel efficiency, but will increase engine performance. Nowadays, cars are equipped with direct fuel injection engines with a system that automatically adjusts the fuel/air ratio to an effective level.
If you still have some other concerns, comment below. I am going to answer all if I can :3
1. Manual transmission car is more fuel-efficient than automatic transmission.
In fact, automatic gears are equipped with advanced technology that helps reduce fuel consumption by as much or even more fuel-efficient than manual transmission.
2. Starting a car consumes more fuel than leaving a car running with no load.
In many situations, you should turn the engine off and restart instead of allowing the engine to run for too long. Depending on the engine capacity, non-loaded vehicles usually consume about 1 to 2 liters of gasoline per hour. If you're just stopping at the red light or a little traffic jam, it's not necessary to turn off the engine.
But If you're going to stop the car longer, I recommend you to turn it off.
(This is true for not only Mazda but other cars)
3. Warm up the engine before departure.
This concept is out of date because today's cars can roll out just after a few seconds of start-up.
4. The older the car, the more fuel it consumes.
This is not the case if your old car remains in good time and properly maintained. A 10-to 15-year-old car may have the same fuel consumption as a new car. One important thing to focus on here is how you keep that car going.
5. Change the air filter could help save fuel.
This is also an old concept from the time when cars were still using a carburetor.
Replacing the dirty air filter will not improve fuel efficiency, but will increase engine performance. Nowadays, cars are equipped with direct fuel injection engines with a system that automatically adjusts the fuel/air ratio to an effective level.
If you still have some other concerns, comment below. I am going to answer all if I can :3
Last edited by fightingraven520; Feb 9, 2021 at 08:53 AM.
Senior Member
Joined: Dec 2020
Posts: 345
Likes: 0
From: NJ
Here are some misconceptions about fuel saving that I think many people still believe in. Hope this post is going to be helpful for you
1. Manual transmission car is more fuel-efficient than automatic transmission.
In fact, automatic gears are equipped with advanced technology that helps reduce fuel consumption by as much or even more fuel-efficient than manual transmission.
2. Starting a car consumes more fuel than leaving a car running with no load.
In many situations, you should turn the engine off and restart instead of allowing the engine to run for too long. Depending on the engine capacity, non-loaded vehicles usually consume about 1 to 2 liters of gasoline per hour. If you're just stopping at the red light or a little traffic jam, it's not necessary to turn off the engine.
But If you're going to stop the car longer, I recommend you to turn it off.
(This is true for not only Mazda but other cars)
3. Warm up the engine before departure.
This concept is out of date because today's cars can roll out just after a few seconds of start-up.
4. The older the car, the more fuel it consumes.
This is not the case if your old car remains in good time and properly maintained. A 10-to 15-year-old car may have the same fuel consumption as a new car. One important thing to focus on here is how you keep that car going.
5. Change the air filter could help save fuel.
This is also an old concept from the time when cars were still using a carburetor.
Replacing the dirty air filter will not improve fuel efficiency, but will increase engine performance. Nowadays, cars are equipped with direct fuel injection engines with a system that automatically adjusts the fuel/air ratio to an effective level.
If you still have some other concerns, comment below. I am going to answer all if I can :3
1. Manual transmission car is more fuel-efficient than automatic transmission.
In fact, automatic gears are equipped with advanced technology that helps reduce fuel consumption by as much or even more fuel-efficient than manual transmission.
2. Starting a car consumes more fuel than leaving a car running with no load.
In many situations, you should turn the engine off and restart instead of allowing the engine to run for too long. Depending on the engine capacity, non-loaded vehicles usually consume about 1 to 2 liters of gasoline per hour. If you're just stopping at the red light or a little traffic jam, it's not necessary to turn off the engine.
But If you're going to stop the car longer, I recommend you to turn it off.
(This is true for not only Mazda but other cars)
3. Warm up the engine before departure.
This concept is out of date because today's cars can roll out just after a few seconds of start-up.
4. The older the car, the more fuel it consumes.
This is not the case if your old car remains in good time and properly maintained. A 10-to 15-year-old car may have the same fuel consumption as a new car. One important thing to focus on here is how you keep that car going.
5. Change the air filter could help save fuel.
This is also an old concept from the time when cars were still using a carburetor.
Replacing the dirty air filter will not improve fuel efficiency, but will increase engine performance. Nowadays, cars are equipped with direct fuel injection engines with a system that automatically adjusts the fuel/air ratio to an effective level.
If you still have some other concerns, comment below. I am going to answer all if I can :3
Last edited by bobm; Mar 14, 2021 at 07:17 AM.
Senior Member
Joined: Oct 2018
Posts: 10,652
Likes: 232
From: Northern California
This is only my opinion and I mean what do I really know right ! My sarcasm is for those that know me and can understand that I get entertained by some threads like these!
Ya I find another MYTH and supporting MYTHs growing with this thread and a lot of inaccurate, unsupported and nothing of empirical data or blind testing so really just bad information!!!
Its your vehicle so believe what you want! LOL
I can say the author IMHO appears having little to no educations or practical experience in how ECUs and TCMs work, how there operating cells/PIDs are developed, the concept of different metal expansion rate when thermal heat is applied and the frictional effect of wear created by uneven thermal expansion rates of differential metals, CFM rating on an induction system and the restriction slowly developed from air filters not service regularly, compression rations decreasing or becoming uneven between cylinders, leak down indicating wear in both or separately the upper and lower end of an engine as mileage increase and the loss of total overall efficiently ... I could go on but I think I made my point......
This thread is MYTH supporting that many of us have read on many forums over the years!!
Ya I find another MYTH and supporting MYTHs growing with this thread and a lot of inaccurate, unsupported and nothing of empirical data or blind testing so really just bad information!!!
Its your vehicle so believe what you want! LOL
I can say the author IMHO appears having little to no educations or practical experience in how ECUs and TCMs work, how there operating cells/PIDs are developed, the concept of different metal expansion rate when thermal heat is applied and the frictional effect of wear created by uneven thermal expansion rates of differential metals, CFM rating on an induction system and the restriction slowly developed from air filters not service regularly, compression rations decreasing or becoming uneven between cylinders, leak down indicating wear in both or separately the upper and lower end of an engine as mileage increase and the loss of total overall efficiently ... I could go on but I think I made my point......
This thread is MYTH supporting that many of us have read on many forums over the years!!
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