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Author Topic: Mk5 GTI fuel consumption  (Read 13913 times)

Offline JoshJaggard

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Re: Mk5 GTI fuel consumption
« Reply #30 on: February 16, 2017, 10:21:57 am »
Hello All,
I am averaging around 30mpg with mixed driving styles, and town + rural roads
(On journeys 10+ miles)

Offline reflexsilverfox

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Re: Mk5 GTI fuel consumption
« Reply #31 on: February 16, 2017, 12:57:55 pm »
apparently i was getting 34mpg last night and that was dual carriageways and pretty "spirited driving" i'm on a stock map in a manual gti with a ramair panel filter - pre cat delete to be done soon and she does need an oil change.

How accurate are the average mpg readings on the display on these cars?

Offline PatchySan

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Re: Mk5 GTI fuel consumption
« Reply #32 on: February 16, 2017, 02:23:58 pm »
Mine usually averages around the 29-30's though the winter season did a beating on my MPG count. Typically spend most of the time driving in city centre traffic (about 12 miles a day) which doesn't help.
All time best: 36.6 mpg - Quite a bit of motorway driving on this stint, recorded 40.1 MPG overall average on one run only to ruin it on the way back with some spirited driving  :driver:)

All time worst: 22.1 mpg - It was cold so I cranked up the heater and seats a lot! Spent a lot of time stationary in city traffic which didn't help!



On a typical commute I get about 240-250 miles to a tank using Shell V-Power, or on rare occasions use Tesco Momentum 99 if I'm passing by.

Offline lukemk5gti

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Re: Mk5 GTI fuel consumption
« Reply #33 on: February 16, 2017, 02:25:08 pm »
Drove about 18km last night after work, no real traffic at about 80km/hr for 14km motorway miles and got just shy of 45mpg.

Didn't intentionally drive easy to get this either


Offline david25

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Re: Mk5 GTI fuel consumption
« Reply #34 on: February 17, 2017, 07:02:56 pm »
For me (17" wheels, no remap)

Motorway 37mpg
A road 35mpg
Town 25mpg


Offline Norfolk Ollie

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Re: Mk5 GTI fuel consumption
« Reply #35 on: February 17, 2017, 08:53:43 pm »
For me (17" wheels, no remap)

Motorway 37mpg
A road 35mpg
Town 25mpg

I agree with the above but when I take mine out at the weekend for a 20 mile blat (stage 1 r-tech with pre cat deleted) I only get about 18!  :fighting:

Offline dools225

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Re: Mk5 GTI fuel consumption
« Reply #36 on: February 23, 2017, 06:21:20 am »
Have only owned mine a few weeks, DSG, so far computer is showing 24mpg but working it out from full tank to empty it is more like 20. Hardly any Mway driving in there. I don't hoon it everywhere all of the time so did expect more around 25/30mpg tbh but never mind  :driver:

Offline reflexsilverfox

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Re: Mk5 GTI fuel consumption
« Reply #37 on: February 23, 2017, 12:49:40 pm »
Changing the PCV to the latest R revision and a switch to 5w40 quantum oil made a big difference in my fuel economy, i can easily get 37-39mpg cruising - i still need to remove my pre cat too

Offline Bigjimknickers

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Re: Mk5 GTI fuel consumption
« Reply #38 on: February 23, 2017, 06:57:40 pm »
Drove about 18km last night after work, no real traffic at about 80km/hr for 14km motorway miles and got just shy of 45mpg.

Didn't intentionally drive easy to get this either


I don't even get that on my Tdi Caddy! I wish on my GTi.

Offline rich83

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Re: Mk5 GTI fuel consumption
« Reply #39 on: February 26, 2017, 09:26:24 am »
Changing the PCV to the latest R revision and a switch to 5w40 quantum oil made a big difference in my fuel economy, i can easily get 37-39mpg cruising - i still need to remove my pre cat too

Thicker oil should actually increase fuel economy, not decrease it.

Offline neilw

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Re: Mk5 GTI fuel consumption
« Reply #40 on: February 27, 2017, 02:34:21 pm »
Changing the PCV to the latest R revision and a switch to 5w40 quantum oil made a big difference in my fuel economy, i can easily get 37-39mpg cruising - i still need to remove my pre cat too

Thicker oil should actually increase fuel economy, not decrease it.

5-40 is thinner than 5-30 at operating temperature. I watched an "Engineering Explained" Youtube video on Oil viscosity and the differences between Fully Synthetic and semi synthetic
Edition30 #0002 R-Tech Stage2

Offline mikezs

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Re: Mk5 GTI fuel consumption
« Reply #41 on: February 27, 2017, 03:20:46 pm »

Offline superchargedpolo

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Re: Mk5 GTI fuel consumption
« Reply #42 on: February 27, 2017, 09:09:48 pm »
I get anywhere between 30 and 40mpg in my Edition 30.
I think my average was about 35mpg for the last 4 fill ups!  I need to have a heavier right foot  :wink:

Offline Dan_FR

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Re: Mk5 GTI fuel consumption
« Reply #43 on: February 28, 2017, 08:24:32 am »
Changing the PCV to the latest R revision and a switch to 5w40 quantum oil made a big difference in my fuel economy, i can easily get 37-39mpg cruising - i still need to remove my pre cat too

Thicker oil should actually increase fuel economy, not decrease it.

5-40 is thinner than 5-30 at operating temperature. I watched an "Engineering Explained" Youtube video on Oil viscosity and the differences between Fully Synthetic and semi synthetic

No its not. The second number governs the viscosity range of an oil at 100 degrees C. The 5w40 is thicker at a given temperature than a 5W30.

The actual differences can vary from next to nothing to 'quite a lot' depending on which end of the range the oils fall in

Thicker oil logically will increase fuel consumption, but using a much better quality oil helps and in the real world this makes minimal difference. New oil is always better than old oil dirty for lubrication.

At the other end of the spectrum people always seems to think a thicker oil is 'better' as it doesn't get as thin when hot, but this isn't always true. There are so many factors involved, such as wear, tolerances, operating conditions and ultimately oil temperature, climate and so on. Having an oil too thick, which doesn't flow as well, resulting in high oil pressure can be as bad as an oil that is too thin.

« Last Edit: February 28, 2017, 08:31:24 am by Dan_FR »
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Offline rich83

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Re: Mk5 GTI fuel consumption
« Reply #44 on: February 28, 2017, 09:18:06 am »
Changing the PCV to the latest R revision and a switch to 5w40 quantum oil made a big difference in my fuel economy, i can easily get 37-39mpg cruising - i still need to remove my pre cat too

Thicker oil should actually increase fuel economy, not decrease it.

5-40 is thinner than 5-30 at operating temperature. I watched an "Engineering Explained" Youtube video on Oil viscosity and the differences between Fully Synthetic and semi synthetic

No