Fuel Consumption Stats

[nightfawl]

I'm still not sure if I am getting good fuel consumption so I took this picture just as I pulled up to the gas station prior to filling up. I would say I did about 75% highway driving (in some traffic but averaging 70-80km/h). I tried to drive as conservative as possible and the best I could get was 9.8L/100km. The thing that baffles me is why I am only getting about 450km per tank. The tank was not completely empty and I probably could have stretched it to 500km before I was bone dry, but I think I should be getting better than this, shouldn't I?

And it took 53L to fill the tank at this point.

Edit: I just did the math and at 9.8L/100km and since it took 53L to fill the tank at this point, I should have had 519km on the tank at this point. (53L x 9.8L/100km = 519.4km)

[Rogue One]

I'm still not sure if I am getting good fuel consumption so I took this picture just as I pulled up to the gas station prior to filling up. I would say I did about 75% highway driving (in some traffic but averaging 70-80km/h). I tried to drive as conservative as possible and the best I could get was 9.8L/100km. The thing that baffles me is why I am only getting about 450km per tank. The tank was not completely empty and I probably could have stretched it to 500km before I was bone dry, but I think I should be getting better than this, shouldn't I?

And it took 53L to fill the tank at this point.

Edit: I just did the math and at 9.8L/100km and since it took 53L to fill the tank at this point, I should have had 519km on the tank at this point. (53L x 9.8L/100km = 519.4km)

Dude! It's too early in the AM for maths! Ok, 53L = 14Gal, so that's spot on average.
9.8L/100km = 24mpg. That's kinda low for 75% highway. I posted elsewhere that my '12 Rogue was getting worse mileage than my '11 did. What I failed to take into consideration was that until recently, I've been running on the winter mix. Now that the amount of ethanol in the mix has been reduced, my mpg's have improved. Any idea what the mix is in Canada?

Winter Gasoline Blends-There is a debate on how ethanol gasoline affects fuel economy. Now, not everybody will have a lot of choices here, but some will. The American Coalition For Ethanol (ACE) released a study a few years back using a Chevrolet Impala, Ford Taurus, and Toyota Camry. They noted how well each vehicle operated on the ethanol blends (E10, E20, and E30) and found the following:

The three vehicles averaged a 1.5% lower mileage with E10, 2.2% lower mileage with E20, 5.1% lower mileage with E30, and increased mileage of 1.7% with a denatured E10 blend. http://www.treehugger.com/cars/why-you- ... ut-it.html

[nightfawl]

I did notice that my fuel consumption has gotten a little better over the past month or two, so I think the "summer gas" is making a bit of a difference. But the picture I uploaded was from last week so it won't be using the winter blends.

I also don't understand why the car is saying 9.8L/100km when in reality if it took 53L to fill up and I only got 455km on the tank, my real L/100km is 11.6. I'm really confused and concerned about this...

[FlashFyre]

I've got a 2011 as well. The L/100Km is out of whack. I think Nissan purposely set it low so you think you are not using as much gas as you are. Mine is usually off pretty close to 1.0L/100km. If the computer says 8.5L/100kms and my calculated is around 9.5L/100kms

[Rogue One]

I did notice that my fuel consumption has gotten a little better over the past month or two, so I think the "summer gas" is making a bit of a difference. But the picture I uploaded was from last week so it won't be using the winter blends.

I also don't understand why the car is saying 9.8L/100km when in reality if it took 53L to fill up and I only got 455km on the tank, my real L/100km is 11.6. I'm really confused and concerned about this...

Well crack open another Labatt Blue and I'll see if I can elucidate and ease your concerns.

The onboard fuel guesstimating system tries to give you it's best guess on your fuel consumption, but it's notoriously inaccurate. Everyone wishes it was otherwise, but it gives us something to gripe about.

AFAIK, filling stations don't drain and discard the winter stuff, they top off with summer, so it can take multiple fill-ups to purge the winter blend from your vehicle. Make sure you frequent a station that does a lot of business. A station with slower sales will retain more winter blend in their tanks.

Give it a few more fill-ups, and I think you'll see an improvement. BTW, can I assume your current on required maintenance? Tires properly inflated, etc...

[nightfawl]

I did notice that my fuel consumption has gotten a little better over the past month or two, so I think the "summer gas" is making a bit of a difference. But the picture I uploaded was from last week so it won't be using the winter blends.

I also don't understand why the car is saying 9.8L/100km when in reality if it took 53L to fill up and I only got 455km on the tank, my real L/100km is 11.6. I'm really confused and concerned about this...

Well crack open another Labatt Blue and I'll see if I can elucidate and ease your concerns.

The onboard fuel guesstimating system tries to give you it's best guess on your fuel consumption, but it's notoriously inaccurate. Everyone wishes it was otherwise, but it gives us something to gripe about.

AFAIK, filling stations don't drain and discard the winter stuff, they top off with summer, so it can take multiple fill-ups to purge the winter blend from your vehicle. Make sure you frequent a station that does a lot of business. A station with slower sales will retain more winter blend in their tanks.

Give it a few more fill-ups, and I think you'll see an improvement. BTW, can I assume your current on required maintenance? Tires properly inflated, etc...

As soon as I get home, I may just do that. But I prefer Alexander Keith's

I only use Shell gasoline from high volume stations. I live right in Toronto and fill up right off a major highway so I don't think there is any chance I am still using a winter blend fuel.

I purchased the vehicle 6 months ago from a Nissan dealership close to my home and it had 42,000km on it. Actually, when I pulled in to work today, it had 49,999km. haha. But anyways, I switched the vehicle to a full synthetic engine oil and just 2 weeks ago replaced the transfer case fluid. So yes, I maintain it well. One thing someone mentioned is that its possible the previous owner drove it aggressively from new which "trained" the engine to use more fuel. Not sure if I buy that...

Either way, I am not all that satisfied with the fuel consumption. I will be keeping my eye on it, but if anyone else has any ideas, i'm all ears! Thanks everyone.

[takeshi]

I think I should be getting better than this, shouldn't I?

You have to establish your own baseline for your driving style, driving conditions, fuel and vehicle. Even two people driving the same vehicle with "75% highway" can have different numbers. It does sound low if the 24MPG conversion is correct but, again, without knowing every detail that factors in we're just speculating. Keep track of conditions and your fuel economy over time. Fixating on one tank by itself generally isn't of much use.

I also don't understand why the car is saying 9.8L/100km when in reality if it took 53L to fill up and I only got 455km on the tank, my real L/100km is 11.6. I'm really confused and concerned about this...

It's really not unusual for those things to be off. Our 2008 is sometimes nearly dead on and sometimes off by 1 MPG. Our RX400h is frequently off by about 2 MPG.

[TrevorK]

I'm still not sure if I am getting good fuel consumption so I took this picture just as I pulled up to the gas station prior to filling up. I would say I did about 75% highway driving (in some traffic but averaging 70-80km/h). I tried to drive as conservative as possible and the best I could get was 9.8L/100km. The thing that baffles me is why I am only getting about 450km per tank. The tank was not completely empty and I probably could have stretched it to 500km before I was bone dry, but I think I should be getting better than this, shouldn't I?

And it took 53L to fill the tank at this point.

Edit: I just did the math and at 9.8L/100km and since it took 53L to fill the tank at this point, I should have had 519km on the tank at this point. (53L x 9.8L/100km = 519.4km)

I have a FWD Rogue and do virtually 100% city driving (70KM/H or less, many lights, etc). My gauge shows me being able to achieve between 7.5 - 7.8L/100KM in the summer time. During the winter with -40 temperatures it'll get as high as 8.7.

The last time I put in about 53L for 620KM, which is about 8.5L/100KM. So it seems your measurement of being about 1L/100KM too low holds true in my case.

[Rogue One]

Hey nightfawl, just a thought. Your highway driving, is it flat terrain or hilly?