Big fat tyres=massive rolling resistance.

Winter brings colder air, and colder air is denser and the Transporter has all the aerodynamics of a house brick. All that coupled with more use of lights, heaters etc etc means lower mpg. My average drops a couple of mpg in the winter.
 
Diesel engines are slow to warm up at the best of times and only work efficiently when up to temp. Try watching the MFD for MPG from cold start to normal operating temperature and will see a very low initial MPG.
I prefer smiles per gallon :)
 
Diesel engines are slow to warm up at the best of times and only work efficiently when up to temp. Try watching the MFD for MPG from cold start to normal operating temperature and will see a very low initial MPG.
I prefer smiles per gallon :)
I am glad you said that (obvious when you think about it but you've confirmed it).
I went for a decent drive last night and only when the engine oil is hitting ~80 degrees does it feel perkier and the MFD reading doesn't drop so quickly.
 
If I'm light on the throttle under acceleration and, and slow down gently, usuing more coasting than brakes, I can get just under 40mpg. If I accelerate fast and brake late, it easily goes as low as 24mpg. General driving gets me about 35mpg.
 
My fuel consumption during normal driving on short trips ranging from 2 km to 25 km is between 36 mpg in summer and 33 mpg in winter. On long trips in summer, I’ve managed to achieve 37 mpg, without exceeding 115 km/h. My vehicle is a VW T6 (2019) 199 DSG 4Motion with 17" wheels and 235 tires, and it has been remapped.
 
First long trip in the van since pop top fitted.

2019 T6 / T32 150 DSG, Skyline Pop Top, 255/45/19 Michelin CC2

Midlands to Germany (450miles). 2 adults, 2 kids and dog. Loaded with around 150kg luggage. Doing GPS 70/72 in the UK and around GPS 80 on the continent. Quite windy all the way.

36mpg. Dropped a bit with stop and go at the eurotunnel/customs (stop/start off).

Non holiday driving, 19miles commute each way, van empty.

35mpg
 
2018 T6 2.0L 105PS and get an average of low to mid 40’s.
Sensible driving 65mph on motorways normal speeds on other roads.
 
I’ve never got more than 38 even keeping it between 60-65 on motorways. 2017 T6 2.0l 102 with a dav-tec remap - which made a noticeable difference power wise but didn’t affect mpg much either way.

According to the Roadtrip LE app my average mpg overall since I’ve had the van is 31 over 6152 miles, thats various driving conditions including local running around and several journeys of a couple of hundred miles or more - always filling up when I refuel
 
First long trip in the van since pop top fitted.

2019 T6 / T32 150 DSG, Skyline Pop Top, 255/45/19 Michelin CC2

Midlands to Germany (450miles). 2 adults, 2 kids and dog. Loaded with around 150kg luggage. Doing GPS 70/72 in the UK and around GPS 80 on the continent. Quite windy all the way.

36mpg. Dropped a bit with stop and go at the eurotunnel/customs (stop/start off).

Non holiday driving, 19miles commute each way, van empty.

35mpg
Just back from the trip. Strong headwind in Germany and Belgium. DSG was shifting down into 6th gear to maintain 70mph.
consumption on the continent: 25.8mpg (220miles)
 
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