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What is your best mileage for Tucson? Mine was 7.0 Liters /100Km.

2K views 8 replies 4 participants last post by  tucson-lover 
#1 ·
What is your best mileage for Tucson? Mine was 7.0 Liters average /100Km.

After doing maintenance; Coolant flush, Transmission flush, new brakes/rotors, changing the rims to 18" and tires to 245/45/18" and new engine filter and cabin filter, cleaned air box and intake piping, I checked my average mileage and was surprised to have found my all time low 7.0 liters / 100km.

What is your best mileage for 2010-2017 Tucson?

I am not completely sure if changing rims to bigger ones 18" (vehicle came with 17") and brand new (specific brand) engine and cabin filters are the main factors to this fuel efficiency 7.0 liters / 100km.
 
#3 · (Edited)
Actually, I have also cleaned the throttle body recently.
Yesterday, having driven the vehicle for 150/kms (highway plus city driving), I checked the gauge and it showed 7.0 Liters / 100Kms. This morning I drove the vehicle and checked it. It showed 7.2 Liters / 100Kms. So it is consistently low now. Before the maintenance, the lowest I could reach was 9.2 Liters / 100Kms.

As part of the maintenance, once every 2 months, I would spend $20 at Shell getting V-Power Nitro or Petro Canada for super-clean gasoline, just to help clean-up the fuel injectors.

Also, engine air filters are not made the same. The new one I am using now seems to have an important role also. I bought from a part store, the clerk gave me a brand name which was made by this company BTK Canada Inc. I am an IT guy and I do not work for these companies, thus, I am not endorsing any company. I am just giving out my experiences in getting this fuel efficiency. So the engine air filter I am using now is not Hyundai OEM, nor FRAM nor K&N.

For those, who have the knowledge, skills and tools to maintain your own Tucson, it might be better to do it on your own after the warranty has expired. Last December I bought a set of 4 winter tires at Canadiantire, and since they offered to load and mount the tires, I let them do it. Only to find out that Canadiantire tech guy who did the tire job had cross threaded 2 bolts.

When I brought my Tucson in at the dealership to get 48,000 km factory maintenance, they changed the coolant without advising me. As per Hyundai maintenance guide book, Hyundai factory coolant is good for at least 120,000 Kms. The Hyundai dealership also changed the engine air filter with Hyundai OEM one, but the tech did not clip one of the 4 air box latching clips. What had happened was that the Hyundai OEM filter rubber around the edges was hard and not flexible enough that one of the latching clips was hard to be clipped on to the box, so instead of extending the metal latching clip of the air box so that it could be clipped on easily, the dealership tech guy just left one of the latching clip dangling without being clipped on to the air filter box, leaving a slightly opened air filter box.

So, occasionally I would see the idle rpm needle drop to below 600 rpm and went back up again to normal 625 RPM, because obviously the throttle body was getting way more air than normal because of a slightly opened air filter box.
 
#4 ·
A dirty air cleaner will have no impact on fuel consumption as the MAF sensor will compensate by letting more air through the throttle body of course a clogged air cleaner will affect performance. I have 2012 2WD Tucson with 138000km i'm on my second air cleaner which now has about 70000 km and I can get just under 7.0 liters per 100km if my speed is kept at 90 to 100k kph. At 120 I average 7.5 as long as there are no hills or headwinds. Still have original spark plugs, I do plan to clean the throttle body this summer.
 
#5 · (Edited)
Thanks for chiming in on this. First of, there is no MAF (Mass Air Flow Sensor) on 2010-2017. There is only MAP (Manifold Absolute Pressure) which works differently from MAF sensor. A dirty air filter/cleaner will most definitely affect fuel consumption on any car, not just on the Tucson. Oxygen and fuel are mix in the combustion chamber to generate power. Your engine compensates for lower amounts of oxygen (due to dirty or clogged air filter/cleaner) by consuming more fuel to produce sufficient power.

Without tune-up or maintenance, there is just NO way you could reach the amount of fuel efficiency you mentioned in your message, under 7.0 and 7.5 regardless driving speed and driving conditions. Before the tune-up and maintenance I could only get 9.2 Liters / 100Kms.

Can you post a screenshot showing your gauge displaying under 7 Liters? It is a bit difficult for me to grasp it. Thanks.

The fact that you mentioned MAF when discussing about 2010-2017 (newer) Tucson, which is not there in newer Tucson makes me doubt your claim of "under 7.0 Liters" on Tucson gauge. Sorry. :)

Hyundai put Iridium plugs in Tucson, they are good for 150,000 Kms. So you can just clean them from any carbon or white sooth now, no need to replace them yet. My Tucson has about 88,000 clicks now, that is why I have not thought about replacing the plugs yet.
 
#6 ·
https://m.csmonitor.com/Business/In...umer-Reports-takes-on-alleged-gas-saving-tips

"Dirty air filters kills gas mileage

Much like warming up your car, dirty air filters did used to impact gas mileage, especially in older, dirtier carbureted engines.

Nowadays however, air flow sensors and computer software carefully manages the air/fuel mix in your car’s engine, ensuring maximum fuel economy is possible regardless of the quality of air.

Where it will make a difference however, is performance. If the air filter is dirty, less air can get into the engine under hard acceleration, meaning your car speeds up more slowly."

 
#7 ·
The guy in the YouTube footage did not present the viewers with empirical data, stats, graphs, nor computer analysis charts to show that lacking oxygen in the combustion chamber due to dirty and or clogged air filter/cleaner in modern vehicle engines does not impact upon fuel economy.

From the theory of Physics alone, what the guy in the YouTube footage was saying does not conform to basic principles of combustion engines using oxygen and fossil fuel to create power.

Obviously the guy in the footage is very much like you, making claim without empirical data. :)

Where is the pic showing your "under 7 liters / 100kms?

https://m.csmonitor.com/Business/In...umer-Reports-takes-on-alleged-gas-saving-tips

"Dirty air filters kills gas mileage

Much like warming up your car, dirty air filters did used to impact gas mileage, especially in older, dirtier carbureted engines.

Nowadays however, air flow sensors and computer software carefully manages the air/fuel mix in your car’s engine, ensuring maximum fuel economy is possible regardless of the quality of air.

Where it will make a difference however, is performance. If the air filter is dirty, less air can get into the engine under hard acceleration, meaning your car speeds up more slowly."

https://www.youtube.com/watch?v=kdiEoBPkY_8
 
#9 · (Edited)
I think I mentioned highway mixed with city driving, anyway. New battery. Clean the throttle body and valve. Replace front rotors and brake pads in front and rear. Put a set of 18" rims and high performance tires. Make sure the tires are inflated properly. Replace serpentine belt. Every month fill up with Petro Canada or Shell best grade gasoline once or twice. Unfortunately, you will have to go back to using the stock intake system (piping) and air box. Your Cold Air Intake does not really help you with fuel economy (efficiency), but rather 0 - 60KM velocity alone.

These are some of the things I have done recently. There is a chance that 19" rims and tires provide better fuel economy. I have not tested it as I do not have 19" rims. Our Tucson can take up to 19" rims (245/45R19).

New serpentine belt, battery and alternator have an impact upon fuel efficiency because newer Tucson has an electrical power steering system with a motor mounted behind the steering wheel covered by the dash. More stable electricity (from battery and alternator) can contribute to more accurate power steering system. As well, newer Tucson has an electric throttle valve controller with a motor instead of a string of wire or line. Better and more stable electricity contributes to better throttle valve opening and closing responsiveness, thus better fuel efficiency.
 
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