General pre delivery mpg question
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General pre delivery mpg question
AGH1965
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4.3 l/100km? Do you ever exceed 100 km/h? Most of the time I drive 120 km/h (on the dash). At that speed 4.3 l/100km is way out of reach!
10 mpg? That is much!
The MFD of my current 500S shows a rather consistent difference of 0.1 - 0.2 l/100km. So did the one of my previous 500. That is only 2 to 4 % difference. I think that is not bad at all. (For evidence search my nickname on www.spritmonitor.de. Of course I reset the trip computer at every refueling.)
Sharp!
I'm pretty sure that car manufacturers convinced the authorities that this S/S switch is there for safety reasons only. What if your car has starting problems and you wouldn't be able to switch S/S off? That would be a serious safety issue, for example if you stop your car accidentally on a railway crossing...
If it has starting issue when SS will be the least of your issues, and who is stupid enough to stop on a railway crossing (probably the one who didn't deactivate SS
) well Cinnaminta has just over 250 miles on it, in total, reading 55.3 on the display. cant wait for its first fill up to check it, have to wait a wee while yet tho, still only half way down on the gauge.
ps how do I get the PROPER fuelly sig in stead of this thing
ps how do I get the PROPER fuelly sig in stead of this thing
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agreed,
but pretty much the same every day over a 12 month period..,
if I do the journey later in the day - it'll be 15 -20 MPG better.
on the outward..but the same on the return..so Temp IS a major factor
the Twinair seems especially fussy to Air temps
Still that's only a small temp difference and 12-25*C is still well within the ICE sweet spot, and if anything, turbos love the cooler air. I started my Renault yesterday at 13*C coolant/ ambient temp, and recorded a 6.4 commute, drove back with the water temp still at 58*C (and about 25 ambient) and only got 0.4 better, even by stacking the deck and starting with a fairly warm engine.
Here are some figures:
http://www.metrompg.com/posts/winter-mpg.htm
Here are some tips for improving warm up times:
Run your engine oil at the MIN mark, oil takes twice as long to get up to temp compared to coolant. In my case, that's about 10km.
Block the grill, just about any car can have half it's grill opening blocked all year round. I've got a 80% block on the Renault with perfectly normal temps other than improved warm ups. Ideally you'll want an OBD gauge to do this safely, but 50% should be safe on any modern car in the UK.
Hybrids are set up to run the ICE aggressively during warm up. This can mean 10l/100km for the first five minutes, but this is paid off when the rest of the trip records 2-3 litres (over 100mpg). I'd consider driving 'normally' to 50*C coolant then giving it a bit of stick
I don't dispute that the raw data coming from the ECU is accurate, the problem for some of us is the clipping of values <2l and >25l. If you mostly drive within that window, you'll have no problem. If you spend equal time above and below they'll cancel out. The problem comes up when you spend a lot of time driving on one side, as you can imagine, to get 4.3 for the tank I must spend a fair amount of time below 2l, which constantly being recorded as 2.0 even though it could be 0.0. The margin of error becomes worse the more economical you drive.
well Cinnaminta has just over 250 miles on it, in total, reading 55.3 on the display. cant wait for its first fill up to check it, have to wait a wee while yet tho, still only half way down on the gauge.
For referance, my first tank returned 36mpg! 55 took a lot of miles of break in to get to 55! Makes me wonder if Fiat changed the tolerances so new engines aren't so freakin' tight any more.
You can see an almost perfect curve of improvement with each tank. The three tank dip in the middle I put down to a dying battery as my MPG shot up massively with the new one, right back to match the curve.
Why not? Just let the car do its thing
Because the journeys so far have been a longish clear run trip, or swmbo nipping up the road to keep fit,French lessons,school run, and the shorter runs are less than 2 miles, so it would s/s prob 5 times in 2 miles, engine not warm, battery not getting a proper charge. If we were to , say go to london, or another big town, / traffic congested area, that involved a 'run, then yes. All this stop start, causes the alternator to work for its living, thus putting a load on the engine.
I do wonder exactly how much fuel the tiny 2 cylinder engine actually uses on tickover.
After all there there are those in the hypermiling world that actually remove the alternator completely, with very good results, and just put the battery on charge overnight with a plug in..
s/s is a little bit of a gimmick I believe, but could work in a busy city, with a hot engine, but no for me, yet as its not even run in, and it is very tight.
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You may be right, but I love S/S because it's quiet and peaceful waiting at traffic lights. Engine off and starts immediately you depress the clutch to engage gear.
Whether it saves money in fuel, I don't really know, but I still love it never-the-less.
Our's works within half a mile from cold.
Cheers,
Mick.
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You can have a look here as to my figures on S/S:
https://www.fiatforum.com/500/342685-some-interesting-data-collected.html
AGH1965
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That the MFD shows clipped values doesn't mean that these clipped values are also used for calculating the average. Only a brainless engineer would program it that way. I'm not saying that FIAT hast the smartest engineers, but they aren't completely stupid either.
I visited your page on ecomodder.com and I saw some suspicious things. Your last 2 refuellings you filled 34 l and 35 l. I simply don't believe that you needed exactly a whole number of liters to completely fill your tank at 2 consecutive refuellings.
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It's an easy thing to test, you really don't have to take my word for it
I wrote a note on the last fill 'marker' I sometimes do this if I want to make a note of something before I forget it (eg octane used, additives, unique trip conditions, modifications, part fills etc). It was a part fill so the exact number will be in next time I drive the car. As for the 34, it could have been 33.9 or 34.1 and I rounded it, it's not really going to affect the stats on a 770km tank (I usually enter exact numbers from receipts but with five cars, I might misplace one occasionally) . If you look at my first three tanks, they average out exactly 35l each (very suspicious if you consider the car has a 35l tank), if you want to find nefarious numbers, you'll find them. Also my Renault currently scores 66.6% over NEDC :devil:
the fuel tank will take 42 litres from empty.....
AGH1965
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UFI, if you change these 35 litres to 42 litres, then your mpg will be quite normal!
According to the info, the 500TA has a 35ltr tank.
Are we saying there's another 7ltrs in there?
Somehow I doubt it.
Regards,
Mick.
Are we saying there's another 7ltrs in there?
Somehow I doubt it.
Regards,
Mick.
Dear god this forum is full of knowitalls who know nothing.....
I presume Maxi is including what the filler neck etc can take, a few have managed to fit more than the acclaimed capacity in their cars
I presume Maxi is including what the filler neck etc can take, a few have managed to fit more than the acclaimed capacity in their cars
The fuel system is designed to operate with an airspace; the design capacity is 35 litres and you'll get about this much in if you fill the car up to the point when most automatic fuel pumps cut off. If you continue to dribble fuel in after the pump cuts off, you can get another 5-7 litres in.
The handbook gives a specific warning not to do this.
it does, but 80k miles on and having done this on most fuel ups there have been no ill effects. One suspects it may be more to do with people not spilling fuel than some damage to the car.
Of course if the manual says not to and you do it and your car breaks then it's not my fault
Of course if the manual says not to and you do it and your car breaks then it's not my fault
Soooo, fuel milage checkers, how do you fill up then,
1 click of the nozzle,
1 click, then another click
1 click plus 2 clicks,
or fill it up ''top top'
I know that whatever you do, it will never be the same twice, BUT it will all even out in the end.
BTW approaching 300 miles now and still on 55mpg, did drop down to 54.3 but managed to get it back up....whew!, and no I'm not a snail.
1 click of the nozzle,
1 click, then another click
1 click plus 2 clicks,
or fill it up ''top top'
I know that whatever you do, it will never be the same twice, BUT it will all even out in the end.
BTW approaching 300 miles now and still on 55mpg, did drop down to 54.3 but managed to get it back up....whew!
, and no I'm not a snail.
