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- เผยแพร่เมื่อ 5 ส.ค. 2024
- You can't trust the onboard trip computer! They're not accurate! Or are they? In this video I find out for sure...
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Really interesting video! Thanks for pulling that together and sharing the numbers.
Always appreciate that attention to detail. 👌
Very interesting that it eas so accueate and incresible attention to detail documenting how many litres to cost since you 1st bought it. I hope you had a great Xmas and New Year. Thanks for the heads up on the headrest mount too, I finally got one.
Nice one. It'll last...mine's well over 10 years old now, still going strong!
Surprisingly accurate. Happy new year fella.
Thinking mans video, enjoyed that! Hopefully the mouth breathers won’t chime in too much 🤩 Exciting news about the new car too 👍👍👍
They're already here Gerry 😂
Thank you so much for doing this Mark, really appreciate it. You have another subscriber.
You're welcome Nik, glad I could help 👍
Happy new year Mark, I've often wondered how accurate the fuel computers are. I'm gonna download that app now🙂
Very informative video Mark 👍
Very good mpg for a high performance hatch mate.Happy new year 🥳
I concur, I did similar calculations with my M240i, not over as many miles as your data but over several refills I got similar results. Always within 1 or 2 mpg but generally the trip computer was on the generous side. Good to know it's reasonably accurate.
Very interesting! Think my M140i averaged around 26 (on the computer) when it went back with almost 10k on the clock. Unfortunately the M2C is currently reading 20.8mpg from new, using your workings out that means it is actually only averaging bang on 20mpg! One major problem with the S55! Happy New year Mark
Great content as always Mark, keep it up. You mentioned you use the Tesco 99 RON fuel, how much difference do you think this makes?
On MPG, I can't say. What I do know is that a friend's B58 engined 440i running standard 95 ran at Surrey Rolling road, and Charlie immediately called him out on running "crap fuel". That's enough for me to keep running 99.
Love the analytics Mark and I'm very surprised that the computer was so accurate! I think I'm going to join your nerdyness and download that app too.
Happy New Year!
I give this one a BIG thumbs up! I did a similar test on my 2013 GMC Sierra 1500 4 WD 5.3 liter V-8.
While towing my tandem axle job trailer I normally get just 8 to 9 miles pr. gallon. I am testing out a gasoline catalyst that claims to clean the carbon deposits out of your engine and off the sensors, increase octane and improve MPG and performance.
There is another question I would like to ask. My truck also has a "Fuel Range" feature that shows how far you have left to go on the fuel that is in the tank. I would assume it calculates this based on past performance. I wonder how far back it goes to calculate this? Do you know?
Interesting video mark 🤙🏼
Never really understood people’s scepticism behind onboard trip computers. Your video kind of proves the my point, interesting stuff. Suppose with a an error that small you could throw in another variable and question the calibration of the forecourt fuel pump counter.
Happy new year to you and the family. Got to love a bit of Data . Shame you never did this for the RS. Mind you, I could never spend nearly £4K on fuel. 😱
I logged the fuel usage just as I did here...but I never logged the trip computer figures. As for fuel expense...I like it. Every litre is a whole load of fun. The more I spend, the more fun I have.
Part of me would like to know what mpg I get on my Land Rover defender but I think it would leave me in tears and my pedal bike would be used a lot more. Great video.
Interesting results. I will be checking my new m235i when I fill it up but sadly the computer is saying it’s doing only 22mpg!!
Most my other cars have been between 2-3 mpg higher than the real figure so I’m hoping the m235i is better.
My old e36 m3 I had years ago you could calibrate the trip computer to get it almost 100% accurate which was good.
Can you check your trip computer and move it to metric see what the liters per hundred kilometers are? I have a feeling that this measures imperial gallon mpg. And our friends in America are looking at, on their trip computer, a imperial mpg, even though they’re thinking it’s a US gallon mpg.
I did ask you for your lap times in November and after seeing the fuel consumption for that track day being significantly less than the summer one can I ask how many sessions did you do?
I only managed 4 sessions. The track was so slippery people kept going off and binning their cars so that halted a few sessions.
Brilliant mark,great content brilliant uploads throughout 2019 m8 really enjoyed them
All the best and cant wait to see the new car and content in 2020,
Keep up the great work mate
Thank you Marc!
Nice vid mark! I've done 8571 miles in mine including 1 trackday morning and 2 months at stage 1 ecu tune... computer says I'm currently at 29.1mpg. Sadly I dont have all my old fuel receipts to work it out officially.
Trackday was hilarious. £63 of VPower and I emptied it in 63 miles!
Keep up the good work.
Ps... first dibs if you ever sell the LSD 😍👍
That's good going Nick! The diff...unsurprisingly it'll not be for sale any time soon...and when it is, it won't fit your car! The ZF8 needs one with a different final drive ratio, mine fits the manual 140 only...or a ZF8 M135i...just not the M140i ZF8 auto.
@@MarkCup70 that makes sense. Shout if you ever see one 2and hand x
£1 a mile 😯 makes me feel better running my Toyota hybrid at 8p per mile.
@@johnhall4917 🤣🤣🤣👍👍👍
I do a fill to fill comparison a few times when getting a new car just to get a feel for how accurate the on board computer is and then I don't bother from then on so admire your fastidiousness . Just flicked back to your RS costs and looked at the MPG there which was interesting. Also having recently purchased a MK8 Fiesta ST I looked at your mpg figures for your MK7, I'm getting just over 30 mpg at present and the onboard is about 10% out.
10% or so is what I recall...I used to log all the fuel data but never recorded the trip computer readings. It was usually 3 MPG or so out.
I find my '17 M140i also fairly accurate on the indicated mpg. I have also recorded every fill for the last 30K miles and my average is just short of 35mpg, also a manual. I live out of town in the country and consequently very few of my miles are stop start city driving, makes a difference.
Another manual owner, nice 👍 Mine could easily get better MPG, my commute is quite free of congestion, and it's braking that uses fuel. I'm just a little too fond of my LSD and the loud pedal 🤣
My Golf IV speedometer is fairly accurate and the MPG trip computer is also accurate (verified with GPS and manual mpg “checks”). Of course it is slightly off as expected but it actually shows worse mileage via the trip computer versus what I measure.
Am I more nerdy for (instead of using an app) writing the odo reading on my petrol receipts and entering the mileage, litres, and cost into a spreadsheet?
😀👍 I do both! I use the app just for logging the fuel data but that all gets manually enetered into a spreadsheet from which I can extract or analyse just about anything.
Good video 👍
I'll have to start logging my usage (but I'm scared!). Would be interesting to compare a manual M140i versus my M140i Shadow Edition (8 speed auto).
I'm sure the ZF8 will be far more economical with its super long 8th gear.
Ok, I also do the nerdy thing and log all fuel purchases - been doing so for years. Here's one of them - Golf GTI 1.8T from 2000 to 2016 - mpg from fuel used (114976 miles, 3450 gallons) is 33.3. MPG from on-board computer data is 35.9 - difference is 2.63 mpg, margin of error, is 7.9%. And, it's consistent - the standard deviation around the 7.9% is 2.8%.
Do you have a spreadsheet where you enter data when you fuel up ? also same for your car expenses ? i really wanna start doing this for my next car
I see the world as rows, columns, and formulae 😂 Yes I have a spreadsheet I've built over time into which I plug everything. From that there's not much I can't analyse.
@@MarkCup70 would you mind sharing it through google docs link maybe? or have you spent that much time that you don't want to be giving it away.
DM me on IG or FB and I'll happily share it, although I can't provide support...you'll have to work it all out for yourself!
It would be nice to see how accurate the pumps are that you're using. They could be adding to the discrepancy you see. I'm sure there's a legal amount the pumps are allowed to be off by, and I am sure petrol stations are overestimating at least as much as they can get away with. How often are pumps calibrated? How far can they be out of calibration? How much can a pump vary with temperature change? All questions part of the same equation. Interesting finding, 2.5% is very good but perhaps it is 1.5% actual due to pumps being off, or maybe even closer?
I think pump calibrations are quite tightly controlled and regulated...as if not it could/would be open to massive abuse. Fuel volume with temperature changes could certainly be a factor. Enough to make a difference here...? I've no idea!
When I bought my current car I downloaded a fuel app (fuelly maybe?) never used it haha! Anyway Happy New Year to you.
It does take a little dedication to do it every single time 🤣
So I did an experiment in my 2019 standard model the other day. Over a 110 mile journey, mostly dual carriage ways and A roads using eco pro and comfort modes and prem ul fuel I averaged 34 mpg. This was driving pretty much as conservatively as possible. My commuting averages average 20-21. I do believe for whatever reason (perhaps a couple of thrashings when running in), I have a poorer return than average but luckily my morning commute is only 6 miles
Short trips will always result in higher fuel use
@@richierich9761 i know that but my non urban mpg does seem a few lower than what others are quiting from theirs. Must have a lead foot
@@tristandrew5903 Good MPG is all about avoiding the brake pedal. The more you press that, the more fuel you will use as you're turning valuable kinetic energy into heat and brake dust.
Very impressive video and very impressive MPG for a inline 6 with 320ish bhp
Ahem, mine has 357 bhp and 396 lbsft. Immense economy considering 👍😀
You forgot to mention the forum guys who say you shouldn’t buy a performance car and ask about fuel consumption
🤣🤣👍
3k on fuel for 17k miles not bad, i spend 1k already on just 4k miles on my bmw, i blame poor mpg and extortionate fuel costs thanks to the government
Have you factored in the odometer error, usually around 2-3% off - same with the speedometer error. Odometers aren't 100% accurate either. Lets say odometer shows you drove 300 miles with one tank of fuel and the truth is something like 295 actual miles. Now you calculate your MPG manually with that 300 mile reading. Those small differences do factor into the (especially long term) MPG readings which drivers calculate themselves. Just saying.
Mark's brought an automatic Corolla. With an exhaust!
Rumbled!
I think its a naturally aspirated engined car. Gt86 or something similar.
I wish!
This video is really good, but really sad, someone had to make it though 😂 Cheers
Speedos always over read... By at least 3% sometimes over 5%. Trip meter is based on speedo readings... mileage racks up that much faster too. So you pay for services sooner as well as changing the car earlier...
That may be the case but it would affect both the actual calculated MPG and the trip computer MPG (which is what I was looking at here)...wouldn't it?
I picked mine up today and over the 45miles home, averaged 50.1mpg according to the computer, was actually closer to 49 but still, not bad for a mix of cruising and a couple of blasts, very happy with that!
Lots of average speed cameras, and camera Van's (eye roll)
It’s accurate because you fill with finest fuel, otherwise actual consumption would be much higher than trip computer
I'm not so sure...my Fiesta ST and Focus RS and Clio 200 were all run on 99 RON, but they were all 3-5 MPG out.
25 to 30 mpg is good enough for me
A vid on mpg really , so this is what BMW drivers think about and Loose sleepover..😖😴
Yes it is. Also includes spelling correctly 😂
@@AceITH007 😂👍
It's not a video on MPG, it's a video about the accuracy of the onboard trip computer. The actual or calculated MPG is irrelevant...the difference is what I was looking at here. And it's not just BMW drivers, as a Ford driver I did exactly the same, and as a Renault driver.........
I think using the word "trip computer" is misleading. You are really comparing your app to the on board computer. The long term data.
I'm not comparing my app at all...all my app does is record the volumes of fuel and mileage travelled which I key into it. ALL my calculations are then done on a spreadsheet. So long as we accept that the car's mileage and the pump fuel volumes are correct, then my figures for actual MPG are correct.
If your worried about MPG buy an electric car
Who's worried about MPG? Are you? I think the point and topic of this video has just flown right over your head 😂
Snoozefest 2019.
Stay tuned for more sleep tonic coming your way in 2020 😆