D5 (2005 on) - Fuel consumption question - Page 5

Clan · Sep 11th, 2009, 18:09

Quote:

Originally Posted by RJNEEDHAM

Have to agree with all the other replies. Low mileage diesels can give lower mpg and it depends on the road and driving styles. Many engines don't loosen up until 30k. Diesel engines that don't get a good run and do short journeys foul up quickly. An ex demo may suffer from this and you are doing only short journeys. However, I can recommend a fuel treatment to SAFELY clean up your engine. Either Texaco's own or Valvoline - choose the premium grade as there are two for each fuel type. These use the same additives in a concentrated form as is found in V-Power and Ultimate. Add this as directed and take it for an Italian tune up - high revs when hot. This may help to increase mpg a little once its all cleaned up. Next, use a premium grade diesel to keep it clean. Supermarket and cheap fuel do not have the additive systems that are used in the premium grades such as V-Power and BP Ultimate. I have tested these over the years of many thousands of miles on 3 - 4 cars and return 10% higher mpg's and they are not 10% more costly. Plus they protect the fuel system from tank to exhaust.
Check all the other obvious things too but I belive in time you will improve mpg. Good Luck!

Volvo specificaly forbid any fuel or oil additives , if any traces are found , the warranty claim it will be rejected ..

KHG · Oct 14th, 2009, 16:45

Try driving in manual mode-it will improve!

Keithv40 · Oct 14th, 2009, 20:10

My V40 1.8i says I'm doing 44mpg, actual is about 40 (mix of town / motorway). Front tyres are due for replacing so maybe the difference in diameter beween old/new tyres explains some of the discreprancy.

More relevant to you though I think is a Merc 2.2 diesel I used to drive would average 50 - 55mpg motorway driving, in fact if you got less than 50 mpg you were doing something wrong. It's about middle of their range so not huge but still a bit of a tank. Fast driving = low 30s mpg (late for something once - had my foot down), 'easy' driving 60mpg poss. Brim to brim showed computer accurate to 0.1mpg.

Oct 14th, 2009, 16:45	#42
KHG New Member Last Online: Nov 19th, 2009 11:45 Join Date: Oct 2009 Location: Cumbria	Try driving in manual mode-it will improve!

Oct 14th, 2009, 20:10	#43
Keithv40 New Member Last Online: Feb 18th, 2015 19:37 Join Date: Sep 2009 Location: Ipswich	My V40 1.8i says I'm doing 44mpg, actual is about 40 (mix of town / motorway). Front tyres are due for replacing so maybe the difference in diameter beween old/new tyres explains some of the discreprancy. More relevant to you though I think is a Merc 2.2 diesel I used to drive would average 50 - 55mpg motorway driving, in fact if you got less than 50 mpg you were doing something wrong. It's about middle of their range so not huge but still a bit of a tank. Fast driving = low 30s mpg (late for something once - had my foot down), 'easy' driving 60mpg poss. Brim to brim showed computer accurate to 0.1mpg.

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