Porsche real world mpg - do you check yours?
Discussion
So after a lot of deliberation I decided to part with my Macan Turbo and I sold it last week. For me the final straw came when I worked out the actual mpg.
Over the last 5 full tanks the computer showed it was getting circa 22.5mpg. The reality on fill ups and measuring mileage was that it was 9-11mpg for each of the five tank fulls. Yes you read that correctly; the car was telling porkies (pardon the pun).
Has anyone else done this recently and achieved anything near what the OBC is stating??
After that revelation I’m glad to be rid of it now as I had been thinking 22.5 was completely acceptable and justified keeping it for longer!
Apart from the hideous efficiency it was a damn good car but I found that it was too much to actually enjoy on the journeys I take.
Over the last 5 full tanks the computer showed it was getting circa 22.5mpg. The reality on fill ups and measuring mileage was that it was 9-11mpg for each of the five tank fulls. Yes you read that correctly; the car was telling porkies (pardon the pun).
Has anyone else done this recently and achieved anything near what the OBC is stating??
After that revelation I’m glad to be rid of it now as I had been thinking 22.5 was completely acceptable and justified keeping it for longer!
Apart from the hideous efficiency it was a damn good car but I found that it was too much to actually enjoy on the journeys I take.
Edited by W12GT on Wednesday 13th November 13:31
Interesting......
I’ve had my MacanS for 15months by now and the trip computer is showing 21mpg over the last 8k Miles or so.
Like you, I’ve not been too worried about the 21mpg but I have become aware of the fact I’m filling the car a lot more regularly than I expected and have come to wonder whether it’s not telling the full story or if I’m just seeing the results of an overly small fuel tank vs the consumption.
I love the car so would have to see a significant drop on the ECU based mpg to give it the kick as you’ve done, but at those kind of mpg levels, I’d be doing the same.
Perhaps I’ll do an old fashioned brim to brim analysis when I can prepare myself for the shock.
I’ve had my MacanS for 15months by now and the trip computer is showing 21mpg over the last 8k Miles or so.
Like you, I’ve not been too worried about the 21mpg but I have become aware of the fact I’m filling the car a lot more regularly than I expected and have come to wonder whether it’s not telling the full story or if I’m just seeing the results of an overly small fuel tank vs the consumption.
I love the car so would have to see a significant drop on the ECU based mpg to give it the kick as you’ve done, but at those kind of mpg levels, I’d be doing the same.
Perhaps I’ll do an old fashioned brim to brim analysis when I can prepare myself for the shock.
Spuffington said:
Interesting......
I’ve had my MacanS for 15months by now and the trip computer is showing 21mpg over the last 8k Miles or so.
Like you, I’ve not been too worried about the 21mpg but I have become aware of the fact I’m filling the car a lot more regularly than I expected and have come to wonder whether it’s not telling the full story or if I’m just seeing the results of an overly small fuel tank vs the consumption.
I love the car so would have to see a significant drop on the ECU based mpg to give it the kick as you’ve done, but at those kind of mpg levels, I’d be doing the same.
Perhaps I’ll do an old fashioned brim to brim analysis when I can prepare myself for the shock.
I will be doing that on my cars from now on. It has certainly made me wonder if it’s a deliberate ploy to lull owners into ignorance. It was the fact that I realised how often I was going to the pumps that made me check it.I’ve had my MacanS for 15months by now and the trip computer is showing 21mpg over the last 8k Miles or so.
Like you, I’ve not been too worried about the 21mpg but I have become aware of the fact I’m filling the car a lot more regularly than I expected and have come to wonder whether it’s not telling the full story or if I’m just seeing the results of an overly small fuel tank vs the consumption.
I love the car so would have to see a significant drop on the ECU based mpg to give it the kick as you’ve done, but at those kind of mpg levels, I’d be doing the same.
Perhaps I’ll do an old fashioned brim to brim analysis when I can prepare myself for the shock.
Edited by W12GT on Wednesday 13th November 17:39
Thinking about it, I filled up with fuel last night (again!). I put in around 56lts for c 256miles of use, which averages out at 19mpg.
Seems a little on the low side since other half did a good half of that at 26mpg on the motorway & the lowest I saw on any of my trips was 19.5mpg on a 35mile blat.
So yes, it is under reading, thankfully not as bad as 9-11mpg but I will be keeping an eye on it.
Seems a little on the low side since other half did a good half of that at 26mpg on the motorway & the lowest I saw on any of my trips was 19.5mpg on a 35mile blat.
So yes, it is under reading, thankfully not as bad as 9-11mpg but I will be keeping an eye on it.
W12GT said:
So after a lot of deliberation I decided to part with my Macan Turbo and I sold it last week. For me the final straw came when I worked out the actual mpg.
Over the last 5 full tanks the computer showed it was getting circa 22.5mpg. The reality on fill ups and measuring mileage was that it was 9-11mpg for each of the five tank fulls. Yes you read that correctly; the car was telling porkies (pardon the pun).
Has anyone else done this recently and achieved anything near what the OBC is stating??
After that revelation I’m glad to be rid of it now as I had been thinking 22.5 was completely acceptable and justified keeping it for longer!
Apart from the hideous efficiency it was a damn good car but I found that it was too much to actually enjoy on the journeys I take.
Very interesting - so what will you replace it with?Over the last 5 full tanks the computer showed it was getting circa 22.5mpg. The reality on fill ups and measuring mileage was that it was 9-11mpg for each of the five tank fulls. Yes you read that correctly; the car was telling porkies (pardon the pun).
Has anyone else done this recently and achieved anything near what the OBC is stating??
After that revelation I’m glad to be rid of it now as I had been thinking 22.5 was completely acceptable and justified keeping it for longer!
Apart from the hideous efficiency it was a damn good car but I found that it was too much to actually enjoy on the journeys I take.
Edited by W12GT on Wednesday 13th November 13:31
W12GT said:
So after a lot of deliberation I decided to part with my Macan Turbo and I sold it last week. For me the final straw came when I worked out the actual mpg.
Over the last 5 full tanks the computer showed it was getting circa 22.5mpg. The reality on fill ups and measuring mileage was that it was 9-11mpg for each of the five tank fulls. Yes you read that correctly; the car was telling porkies (pardon the pun).
Has anyone else done this recently and achieved anything near what the OBC is stating??
After that revelation I’m glad to be rid of it now as I had been thinking 22.5 was completely acceptable and justified keeping it for longer!
Apart from the hideous efficiency it was a damn good car but I found that it was too much to actually enjoy on the journeys I take.
9-11mpg is simply ridiculous. I think you may have made an error in your calculation. My 996T averages about 24. Are you really saying that you only get 100-120 miles out of 50 litres?Over the last 5 full tanks the computer showed it was getting circa 22.5mpg. The reality on fill ups and measuring mileage was that it was 9-11mpg for each of the five tank fulls. Yes you read that correctly; the car was telling porkies (pardon the pun).
Has anyone else done this recently and achieved anything near what the OBC is stating??
After that revelation I’m glad to be rid of it now as I had been thinking 22.5 was completely acceptable and justified keeping it for longer!
Apart from the hideous efficiency it was a damn good car but I found that it was too much to actually enjoy on the journeys I take.
Edited by W12GT on Wednesday 13th November 13:31
My trip computer is accurate.
9 - 11 MPG? Unless I've missed some pertinent information here this seems quite ridiculous.
I know it's far from a scientific conclusion but there appears to be a massive discrepancy with the figures here - https://www.honestjohn.co.uk/realmpg/porsche/macan...
OP - did you question any Porsche dealership about your findings in case yours had a fault?
I know it's far from a scientific conclusion but there appears to be a massive discrepancy with the figures here - https://www.honestjohn.co.uk/realmpg/porsche/macan...
OP - did you question any Porsche dealership about your findings in case yours had a fault?
Spuffington said:
Thinking about it, I filled up with fuel last night (again!). I put in around 56lts for c 256miles of use, which averages out at 19mpg.
Seems a little on the low side since other half did a good half of that at 26mpg on the motorway & the lowest I saw on any of my trips was 19.5mpg on a 35mile blat.
So yes, it is under reading, thankfully not as bad as 9-11mpg but I will be keeping an eye on it.
........ er, 56 litres = 12.31 gallons. Divide 256 by 12.31, it = 20.79mpg.Seems a little on the low side since other half did a good half of that at 26mpg on the motorway & the lowest I saw on any of my trips was 19.5mpg on a 35mile blat.
So yes, it is under reading, thankfully not as bad as 9-11mpg but I will be keeping an eye on it.
Pretty sure my maths is ok:-
50litres /4.554 = 10.98gallons
115miles on odometer/10.98 = 10.75mpg
Absolutely shocking and it happened on 5 fill ups.
That’s the problem with a 6mile country Lane commute I guess.
Regardless of that the OBC was still well out.
Edited to add the second to last one was terrible:-
20litres /4.554 = 4.39gallons
41miles on odometer/4.39 = 9.34mpg
50litres /4.554 = 10.98gallons
115miles on odometer/10.98 = 10.75mpg
Absolutely shocking and it happened on 5 fill ups.
That’s the problem with a 6mile country Lane commute I guess.
Regardless of that the OBC was still well out.
Edited to add the second to last one was terrible:-
20litres /4.554 = 4.39gallons
41miles on odometer/4.39 = 9.34mpg
Edited by W12GT on Wednesday 13th November 20:28
ginettajoe said:
Cheib said:
ginettajoe said:
Cheib said:
It hadn’t registered when I first read the OP’s post but it seems like he actually sold it last week based on some extremely poor man maths !
..... possibly converting litres to US gallons!!
W12GT said:
Pretty sure my maths is ok:-
50litres /4.554 = 10.98gallons
115miles on odometer/10.98 = 10.75mpg
Absolutely shocking and it happened on 5 fill ups.
That’s the problem with a 6mile country Lane commute I guess.
Regardless of the the OBC was still well out.
well, yes your maths are virtually right ( divide by 4.547 being pedantic ) so your OBC was well out, and as you say, the consumption was shocking! I have a 981 3.4 Boxter 'S', and I have just done a 4000 mile trip through France, Andorra, Spain, Portugal, and a combination of high speed, low speed, towns, villages, cities and mountains, and it averaged 33.2mpg overall. The OBD was telling me 35mpg.50litres /4.554 = 10.98gallons
115miles on odometer/10.98 = 10.75mpg
Absolutely shocking and it happened on 5 fill ups.
That’s the problem with a 6mile country Lane commute I guess.
Regardless of the the OBC was still well out.
Honestly OP....I think something was either wrong with the car or the mileage reading/speedo. I don’t think on a 6 mile country lane commute a Macan Turbo gets anything like that consumption. My commute is 10 miles....first two miles is stop start urban traffic, three miles of 40 to 50 mph and then five miles of 70 mph. I’m comfortably at 20 mpg. And mine is a PP.
As a sanity check if these cars were really delivering 50% of what the OBC claimed don’t you think there would be much more about it either on here or in the press ?
As a sanity check if these cars were really delivering 50% of what the OBC claimed don’t you think there would be much more about it either on here or in the press ?
Cheib said:
Honestly OP....I think something was either wrong with the car or the mileage reading/speedo. I don’t think on a 6 mile country lane commute a Macan Turbo gets anything like that consumption. My commute is 10 miles....first two miles is stop start urban traffic, three miles of 40 to 50 mph and then five miles of 70 mph. I’m comfortably at 20 mpg. And mine is a PP.
As a sanity check if these cars were really delivering 50% of what the OBC claimed don’t you think there would be much more about it either on here or in the press ?
But are people REALLY checking on what miles over how many litres that pit in? I bet 95% don’t because our lives are so busy.As a sanity check if these cars were really delivering 50% of what the OBC claimed don’t you think there would be much more about it either on here or in the press ?
Your drive is completely different as I rarely got to 40mph!
It’s definitely 6miles I’ve done the same journey in all my cars and it’s a 6.2miles in all of them. I only used the car for 90% of my mileage to the station and back so it was a total waste tbh. Too big, too juicy and a PITA on single track lanes.
Anyway it’s gone and I don’t miss it at all.
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