Rangster wrote:

range17 wrote:

Rangster wrote:

range17 wrote:

Rangster wrote:

TDV8 doing around 23/24 around town and 28ish on a run. I was getting probably 2 mpg more in the warmer/lighter months.
Interesting to note that when towing a caravan in warmer months I got 25/26 (mostly motorway) which I though rather respectable. It probably helps that I drive with a lighter right foot with the van attached!

Towing with caravan figures sounds good ,as i have yet to tow with my car and is a main reason for getting it ,have you got a big van as ours is a twin wheel bailey which is quiet heavy when going on our main hols to wales

The van is a heavy Knaus (not UK spec), albeit single axle and I don't know the van is on the back. One of the reasons I bought the RRS was for towing.

do you notice a differance with your tuning box ,and which one are you using ?

I'm using a CR Tech 1 Multi-Map diesel tuning box, see www.bluesparkautomotive.com

It makes the RRS more responsive on pick up, certainly from stop or slow speeds. Probably would make more different on a 2.7 model. I've always used the boxes on any diesel I've had as they do make a difference, so it was an automatic move to fit one to the RRS. Any increase in horses are always a bonus.

Thanks for info  zx12r
bmw gs1200 adventure
defender 90 off roader

SRE wrote:

SNIPPED
To be honest I would have expected mine to return a bit more than 20, is there anything I can do to improve this? (Serious answers only please) eg filters etc, all service is upto date but wondering if something may have been overlooked before I purchased the car.

sparky8181 wrote:

SRE wrote:

SNIPPED
To be honest I would have expected mine to return a bit more than 20, is there anything I can do to improve this? (Serious answers only please) eg filters etc, all service is upto date but wondering if something may have been overlooked before I purchased the car.

If you have mud flaps, then bin them. Yes ive got mud flaps, would they really make much difference?
They won't help....

Try adding a some 2T (2 stroke) oil to your fuel. What would this do?
Loads of info on the Disco 3 site...google "Yamaha fan"

Check tyre pressures Only just had the car and not bothered checking them yet, what would you recomend?
All the info is on the label stuck inside your door

Find another garage to fill up at.

I average 18mpg in my 2007 s/c. Thats no motorway driving.

Changed airflow sensor.and air filter, been running around now fo 300 miles town only driving.. no different to my normal pattern.and i am now achieving


10.8 mpg!

Shame i spent my beertokens on the maf sensor and filter...... But being 2 mpg better off means i can recoup more cash from doing pub taxi runs  Why?.. Because i can....
RRS 2006 S/C Rimini Red Weekend toy
Subaru impreza 1998 2.0 340hp still here
Smart car 0.7 61 hp Carbon offset
Sierra cosworth 2.0 350 hp GONE
Various RS escorts, Vauxhall sri's Volvo T5's, BMW 3 series, fiestas (?) fiat's....
Mr Mischief - www.mischief-inc.co.uk

To be honest, I'd doubt that mud flaps make any real difference to fuel economy. I know they look like barn doors hung out in the slipstream but the reality is that they're sat in just about the most turbulent airflow around the car. The wheels make such a mess of the air that immediately behind them the airflow won't care that it's hitting the mud flaps.

Rotating wheels/tyres create a large proportion of the drag of a car. 2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed

I have a tdv6 2.7d I get around 21mpg all city driving local short trips. I have been considering using 2 stroke fuel additive to help with mpg and to help lubricate internal bits after many hours on forums reading up on the matter.

Diesel is a lubricant. Anywhere the 2 stroke oil will go has already got diesel going there already.  2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed

Diesel was more lubricated till it went low sulphur, hey say adding 2so will help, I'm not convinced

ive found no difference in MPG, did a long run manchester to aylesbury this week averaged 26mpg on the motorway reset the counter when i filled up and after town diving it is averaging 22mpg, not bothered really though cos the 59 plate Focus RS we had struggled to get above 22mpg in any type of driving. Discovery TD5 commercial (gone)

Discovery TDV6 Commercial (gone)

RR Sport TDV6 SE (gone)

VW transporter 2.5 sportline (just gone)

Focus RS (dont ask) (gone)

RR Sport TDV8 HSE

D3 2.7 Commercial

To be completely honest the thought of added mpg is just a bonus if it happens. It has been suggested that if you do add 2 stoke it can possibly increase mpg by 5% (for some one who drives a rrs fuel efficiency would never be a major factor when buying it else you would not own one lol ).

However the main reason i am considering adding it is the extra lubricant effect or rumoured it has on the certain engine parts mainly the egr valves.

The low sulphur or lack of required sulphur levels in modern day fuel be it diesel or petrol is the main point of interest for the needed 2 stroke additive in weak concentrations for the added health of the engine. Currently have half a tank of fuel once this has run out i shall fill up and add the 2 stroke. In theory is makes sense just the bitter pill of the thought of adding 2 stroke to a modern day engine.

Once I have put this theory to the test i will post any added MPG results in case any one else is considering it for fuel efficiency or just to add it as a extra engine care product. you will have to bare with me as it takes around 2-3 tanks before any noticeable effects take place so i have read on many a post on various forums.

How does 2 stroke oil help the EGR valves? The only way it can lubricate them is if it goes through the combustion chamber without being burnt. If you're putting unburnt oil through the exhaust system then you're going to quickly kill a couple of catalytic converters. Which is more expensive - EGR or cat?

The whole 2 stroke oil thing appears to have come from the US where, apparently, their diesel fuel is of an inherently low lubricity to start with. In the Europe, we have legislated minimum lubricity levels and all fuel will do the job required of it in both meeting Euro IV (ULSD) and also lubricating as required. Indeed, Esso diesel already greatly exceeds the wear requirements. The maximum wear limit is 460microns, Esso diesel gives 230microns.

Will 2 stroke oil improve on that? Love to see some proper evidence based on real scientific studies. Forum waffle along the lines of "I've been doing it for years and never had a fuel pump fail" etc. isn't really that useful.

Esso fuel: www.hallfuels.co.uk/media/5458/Diesel%20Spec%20Sheet.docx

A study http://www.yamaha-motor.co.jp/global/about...f/0008.pdf of 2 stroke oil that contains high polybutene (added to improve smoking etc in 2 stroke engines) suggests that it might actually increase the wear on bearings. Best check what your 2 stroke oil contains before you run it through your engine.

Anyway, it's your car...  2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed

'06 S/C

We've never measured it around town but as most of my wife's journies are less than 2 miles I woudl guess that we're getting anywhere from 9 -12. She's a gentle driver though. If I drive it I'm sure I can get well below that. There's only 1 reason for buying a S/C after all

I have an '10 RRS 5.0. I drive regularly to Edmonton on the highway about 300km north. In the summer (about 20-25 deg C) I've gotten between 13-16L/100km usually depending on my right foot (15-18 MPG). Winter driving this year (20-25 deg C below zero) has reduced that by about 10%. I don't know why the cold weather changes things but the results are pretty consistent. I was expecting a slight improvement as there is no speed increases for straightaways and such in winter, but that doesn't seem to be the case.

I'm still dubious about the reason for increased fuel consumption during winter. Over the last few months I've lost about 2mpg. (from 28 to 26mpg). I understand that the fuel burning heater uses fuel, but over the last few months when I've started my car it's usually above 4c, which I believe is the temp it operates below. I also very rarely use heated seats or screens. The only thing I use more is the headlights, could they really be the reason for the drop in mpg?