Cheap diesel not as economical

peelaaa · 22nd December 2021, 19:51

With the cost of fuel getting pricey these days, over the last few weeks I tried filling up the car at a cheap place near work. It cost me 1.55 euros for a litre of diesel, while other garages are from 1.60 euros and up.
Now I do the same route to work and back and dropping off child to school in morning.
Outcome of 2 fill-ups at the cheap place got 42 mpg. On 3rd fill up at the regular price garage got 47 mpg. No change in driving, weather similar. Car averaged between 47 and 50 normally over the past year with fuel from regular price garages.
With the cheap fuel, I first noticed this lower mpg as the needle was hitting the 3/4 earlier than before.

What is the content difference in this cheaper fuel?

COLVERT · 22nd December 2021, 20:03

Interesting question. But difficult to answer.---

However, as the price difference is only .05 of a Euro it's probably not worth going for the cheaper stuff.---

peelaaa · 22nd December 2021, 20:13

Agree, it actually costs more overall due to the lower mpg.

MSS · 22nd December 2021, 20:21

I did quite a lot of comparison over thousands of miles using supermarket fuel and Shell V-Power. The V-Power have about a 6%-7% improvement in MPG. The car also felt much more responsive.

These days I use either V-Power (petrol and diesel) or ordinary shell plus Millers Ecomax in the diesel.

BigRuss · 22nd December 2021, 20:21

It's been like that for years, when I was traveling 80 miles a day many years ago I always got more to the gallon from such as Shell, BP or Texaco, the supermarket fuel used to be 6-8mpg less

Russ

Avulon · 23rd December 2021, 16:15

Cue someone to post that it all comes from the same tank at the refinery wherever you buy it. lol.

al_dente · 23rd December 2021, 16:54

If you've got a fuel burning heater, that might make MPG worse if it's cold enough to make it operate.

chris75 · 23rd December 2021, 17:00

Quote:

Originally Posted by Avulon

Cue someone to post that it all comes from the same tank at the refinery wherever you buy it. lol.

Same tank , but you will see that the different delivery chains fill up at different gantries . Different additives are added to different retailers

Avulon · 23rd December 2021, 22:19

Quote:

Originally Posted by al_dente

If you've got a fuel burning heater, that might make MPG worse if it's cold enough to make it operate.

Not really, because it helps the engine warm up faster than it would otherwise. Over the course of a full tank it barelyj reduces mpg, on a cold week it probably even helps keep mpg up. (commuting every day).

coab · 24th December 2021, 11:13

Its very similar to supermarket washing up liquid and Fairy. You pay less for the supermarket liquid but you have to use more to do the same job. Additives enhance the way the diesel burns etc thus a better product but at a cost.

22nd December 2021, 19:51	#1
peelaaa Posted a thing or two 75 cdti 2004 contemporary Join Date: Apr 2008 Location: meath Posts: 1,551 Thanks: 272 Thanked 80 Times in 58 Posts	Cheap diesel not as economical With the cost of fuel getting pricey these days, over the last few weeks I tried filling up the car at a cheap place near work. It cost me 1.55 euros for a litre of diesel, while other garages are from 1.60 euros and up. Now I do the same route to work and back and dropping off child to school in morning. Outcome of 2 fill-ups at the cheap place got 42 mpg. On 3rd fill up at the regular price garage got 47 mpg. No change in driving, weather similar. Car averaged between 47 and 50 normally over the past year with fuel from regular price garages. With the cheap fuel, I first noticed this lower mpg as the needle was hitting the 3/4 earlier than before. What is the content difference in this cheaper fuel?

22nd December 2021, 20:21	#5
BigRuss Premium Trader 75 CDT Tourer,2.5 Launch Saloon, Omipro MG/Rover (T4) Join Date: Jul 2007 Location: Liversedge, West Yorkshire Posts: 5,405 Thanks: 1,105 Thanked 1,340 Times in 661 Posts	It's been like that for years, when I was traveling 80 miles a day many years ago I always got more to the gallon from such as Shell, BP or Texaco, the supermarket fuel used to be 6-8mpg less Russ __________________ Replacement Key Service http://https://the75andztclub.co.uk/...d.php?t=244732 Full T4 Testbook diagnostics available. Diesel ECU repair and replacement. Options enabled or disabled as required. Diesel X-Power 135 and 160bhp, Rover 1.8T 150 to 160 MG 160 V6 to 177 upgrades available P.M. for details.

23rd December 2021, 16:15	#6
Avulon This is my second home 1.8t Tourer Join Date: Oct 2011 Location: Tanelorn Posts: 4,830 Thanks: 956 Thanked 1,148 Times in 916 Posts	Cue someone to post that it all comes from the same tank at the refinery wherever you buy it. lol. __________________ Need a T4 ?: T4 Owners Map thanks to Stevestrat ( use at your own risk) Where?: https://en.wikipedia.org/wiki/Tanelorn Mods/Retrofits: PCV vortex 'filter'; bluetooth; inline thermostat; reversing sensors; plenum spyhole ; headlamp washers ; Diy mp3 player replacing CD multichanger; FBH with remote; Headlamp washers; black/chrome front grille, rear blind; Xenon projectors To do: puddle lights; 2 Din cd/nav to fit; boot release button

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

22nd December 2021, 20:03	#2
COLVERT This is my second home R75 Saloon. Join Date: Feb 2009 Location: France/or Devon. Posts: 14,003 Thanks: 3,851 Thanked 2,167 Times in 1,816 Posts	Interesting question. But difficult to answer.--- However, as the price difference is only .05 of a Euro it's probably not worth going for the cheaper stuff.---

22nd December 2021, 20:13	#3
peelaaa Posted a thing or two 75 cdti 2004 contemporary Join Date: Apr 2008 Location: meath Posts: 1,551 Thanks: 272 Thanked 80 Times in 58 Posts	Agree, it actually costs more overall due to the lower mpg.

22nd December 2021, 20:21	#4
MSS This is my second home Rover 75CDT, Jaguar XF-S 3.0V6, V'xhall Omega V6 Estate, Twintop 1.8VVT, Astra Estate and Corsa 1.2 Join Date: Dec 2007 Location: Suffolk Posts: 7,083 Thanks: 283 Thanked 624 Times in 440 Posts	I did quite a lot of comparison over thousands of miles using supermarket fuel and Shell V-Power. The V-Power have about a 6%-7% improvement in MPG. The car also felt much more responsive. These days I use either V-Power (petrol and diesel) or ordinary shell plus Millers Ecomax in the diesel.

23rd December 2021, 16:54	#7
al_dente Loves to post Rover 75 Tourer Join Date: Jun 2009 Location: Nr Telford, Shropshire Posts: 375 Thanks: 6 Thanked 15 Times in 15 Posts	If you've got a fuel burning heater, that might make MPG worse if it's cold enough to make it operate.

24th December 2021, 11:13	#10
coab This is my second home 2007 57 GOLF GTi EDITION 30 DSG Join Date: Nov 2011 Location: Newport Shropshire and Coventry. Posts: 5,137 Thanks: 2,424 Thanked 1,452 Times in 852 Posts	Its very similar to supermarket washing up liquid and Fairy. You pay less for the supermarket liquid but you have to use more to do the same job. Additives enhance the way the diesel burns etc thus a better product but at a cost.