Clubjazz - Honda Jazz & HR-V Forums
Honda Jazz Forums => Honda Jazz Mk4 2020 - => Topic started by: Nicksey on November 21, 2022, 01:45:10 PM
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OK, when I first picked up the Jazz it came with a full tank. The 'range' indicator on the display reckoned there was 525 miles of fuel in the tank. As the tank and fuel level drops, so does the 'bar' and 'range' indication.. but each time I filled the tank up, the 'range' displays near as dammit 520 miles available again. However, this week after dropping 2 'bars' I decided to fill up. After driving off, the 'bars' didn't immediately go up and the 'range' stayed at 420. The 'bars' did go to max after about a mile, but the 'range' remained at the level pre fill up. It has steadily dropped ever since. I know it was filled to the max level, and I actually did a trip 'reset' too. I am just waiting now for the next time I fill up, to see if it makes a difference.
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Yes, we've discussed this before. The tank range appears to take your previous average MPG into consideration. I think mine at delivery was about 620 miles but I'll never see that again.
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I think you need to add at least 10 liters / 2.5 gallons before the range indicator notices the difference. I read it in the manual somewhere. You can check whether trip A was reset (it resets automatically after a refill); this must also be unchanged since the range didn't go up.
I must say I like the fact that range is much more stable than in the previous Jazz. Mk3 based the range on the last 10 miles average consumption, which made it go up and down all the time. Mk4 shows a first guess and only very slowly changes that. In my case, it shows 900 to 1030 km based on - AFAIK - a whole fuel tank average.
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My two cars had range set at 625 when I got them.
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I think you need to add at least 10 liters / 2.5 gallons before the range indicator notices the difference. I read it in the manual somewhere. You can check whether trip A was reset (it resets automatically after a refill); this must also be unchanged since the range didn't go up
I think you can change it in the settings to either reset automatically when you fill up , or only when you reset it manually.
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I think you can change it in the settings to either reset automatically when you fill up , or only when you reset it manually.
I'm 100% sure you can! ;D
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I think you can change it in the settings to either reset automatically when you fill up , or only when you reset it manually.
I'm 100% sure you can! ;D
Definately, I have it set on mine, very handy.
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I've got trip A to reset at fuelling and trip B manual.
I did have trip B at ignition off, but as posted, that's a pain if you stop mid journey.
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I have A set to reset at ignition off, and B set to manual reset.
Incidentally, today on a 15 mile journey (without any filling up) the 'range' suddenly reset itself to 492 miles!!
No input from me, no resetting.. nada. Since originating this thread, the 'range' has steadily dropped to around 390 miles, and then wham! The 'bars' are still at full too. Odd.
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While my car was being serviced I was loaned a Jazz. The dealer asked me when I bring it back to top up the fuel to the level it was when it left their place. On the way back to the dealers I put a few gallons of juice into the car thinking that should more than cover my use. A few miles on and the guage showed no change so I stopped at another garage and put some more in. When I arrived at the dealership I mumbled something about the fuel level but they were not interested. I reckon I wasted a few quid there!
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When my daughter moved I hired a Transit.
The tank range, which they used as their marker, said about 200 miles. All I did was a 60 mile round trip on A roads and a 50mph limited motorway and when I returned it it was showing about 250 miles even though I didn't put any fuel in.
They checked and were happy as the fuel gauge hadn't moved.
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Probably overpaid for fuel a few times with car hire with old fashioned fuel gauges. Some cars still show full when 5 litres or even 10 litres have been used. Sometimes the previous hirer returned it still showing full but had actually driven quite a few miles. Then for me the gauge drops rapidly. Then the tendency is to fill the tank, maybe adding 15 litres when 5 might have been enough to show full on the gauge. >:(
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Some cars still show full when 5 litres or even 10 litres have been used.
Shouldn’t be a surprise. If you fill a car to the brim, there’s a few litres of fuel in the pipe leading down to the tank. The fuel gauge measures the amount of fuel in the tank and won’t start to move until all the fuel in the filler pipe has been used, and whilst consuming that fuel you’ll have driven quite a few miles. The Jazz has a particularly long filler pipe (I think the tank is under the front seats?) so the gauge won’t move for many miles and meanwhile the computer’s range estimate will be sketchy because it can’t know how much fuel is in the pipe.
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When my daughter moved I hired a Transit.
The tank range, which they used as their marker, said about 200 miles. All I did was a 60 mile round trip on A roads and a 50mph limited motorway and when I returned it it was showing about 250 miles even though I didn't put any fuel in.
They checked and were happy as the fuel gauge hadn't moved.
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Today in new car, done 47.7 miles with left in tank 606 miles = 653.7 miles
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My Yaris would typically do 100km for each of the 8 bars on its fuel gauge, except the first one which took nearer 200 km if the tank had been brimmed including filler pipe. I havnt bothered checking on the Jazz There are already enough fuel consumption and range indicators without watching for yet another. :P
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The gauge is all over the place, and especially hard to rely on the 'miles till empty'. I just use as a rough guide, and, as I tend to refuel when I get down to half a tank anyway, and refuel at that point IF passing a fuel station on the left, it's peculiarities are no bother at all. Just really appreciate the fact that the car gets such great mpg consistently. ;D
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I'm the same, I fill up when half full/empty.
All my Hondas have had the same tank range 'game' and the car is constantly working out the maths from your current fuel level and current average mpg.
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Ironic that Honda strive to shave the last gram from the weight of the car, yet some people carry around a minimum of 15Kg of fuel all of the time.
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Ironic that Honda strive to shave the last gram from the weight of the car, yet some people carry around a minimum of 15Kg of fuel all of the time.
Fine if you only drive somewhere with numerous filling stations and guaranteed supplies.
I prefer not to go under 1/4 full and usually fill up. The cost of carrying round a bit of extra weight is partially offset environmentally by not diverting so often the distance needed to reach and manoeuvre around so many filling stations and possibly holding up other customers who leave their gas guzzlers running while I go in to pay for just a few litres. And financially by filling up when I see a good price close to my existing route.
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With half a tank, I (and you) have enough fuel for about 450 kilometers (280 miles). Where in (the civilized part of) this world is the risk of not finding any possibility to refuel within that distance greater than 0.001% ?
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...When its colder I struggle to get anywhere near 300 miles from the 1st half of the tank.
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Today in new car, done 47.7 miles with left in tank 606 miles = 653.7 miles
A couple of times when I've had a projected range like that, I've tried to get a 1000km tank. (621.71 miles). This goes well until I get to around 550 miles but then the range calculations drops markedly, beyond travel conditions. The furthest I've ever got was 613 miles. I suspect this might happen to you unless you're naturally a hypermiler. You'll still get very good consumption figures though.
Another thing to watch out for might be that new cars can take a while to bed in so your initial consumption figures might not improve until you've a few miles on the clock.
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Makes more sense for those living and mostly driving in town not to haul excess fuel away from every junction . I know I will probably find fuel in time, but I prefer not looking for it so often.
Literally my first long trip in the Jazz I had plotted on the satnav a trip across the Yorkshire moors. Hardly the middle of nowhere. There was a filling station marked that I had planned to use. It was shut. Range showed sufficient to reach the next major town where there would be choice and maybe save a penny or two.
But this dropped alarmingly quickly and by the end I was really quite anxious I would not make it . I got there with about 5 miles range showing ,and hadnt passed any other filling stations.(Had there been one I would have filled up - regardless of cost! :-[ ) Maybe I could have found a nearer one using sat nav if absolutely necessary. Not an experience I care to repeat.
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there are many well written and repeated discussions on fill tank part or full.
In the overall picture driving style and maintenance of the vehicle will give bigger returns.
On fil part/full here is a typical article
"However, the truth to our burning question is that a full tank only accounts for around 5% of the car's total weight. By reducing your tank to half its maximum level, it means you will only save around 2.5% in total weight. This will give you only a very small saving in terms of fuel economy.
Regardless, It is still recommended that you fill the tank up to the top when you visit the petrol station as this will ultimately save you time as you won’t need to make so many trips.
For example, if you fill the tank up and this lasts a month, that’s just one trip. If you top up periodically, you could make three or four visits over the course of the month costing you time. And you know what they say? Time is money!
Ultimately, the difference you save in terms of the weight of the tank is minuscule compared to the amount of time you will save and the mileage of filling up each time."
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...I usually fill up when there's either one or two bars left. You're generally never far from a garage really, unless you live out in the sticks I guess ???
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Gasoline is about 0.75kg per litre, so a full tank is approximately 30kg. Not much on a car that weighs about 1000kg. Also bear in mind the regenerative braking will reduce the losses due to shedding the extra momentum when slowing down.
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...I usually fill up when there's either one or two bars left. You're generally never far from a garage really, unless you live out in the sticks I guess ???
That is exactly what I do.
I've been driving for over 50 years, most of which was business driving all over the UK. I've done over a million miles in that time and never once run out of fuel.
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I remember the 1973 fuel shortage and similar problems more recently.
As a result I never like to have under half a tank, just in case.
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...I usually fill up when there's either one or two bars left.
But hopefully not when you’re driving! ::)
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When mine drops by 3 bars it gets topped up. It costs, on average about £20 to refill it. I do this for no particular reason, other than I like to keep a full tank. I could cite the recent fuel shortages, the impending price rises in fuel, or the fact that having always owned classic motorbikes it was wise to keep the tank full to avoid the vacant spaces rusting.... but none of these really worry me unduly. It is probably because at the drop of a hat, we will venture off into the Dales, Lakes or Moors for a few days. So, we're starting full from the get go.