After 18 months on V Power my local station is going over to Texaco
Apparently I will get double loyalty points though, so maybe instead of a £10 B&Q or next voucher every few weeks will I now get a £20 poundland voucher? [/list]

The reference to engine revs by BarryKey confuses me. Engine sipped in any gear is a function of road speed, and cannot be altered by differing fuels. Unless there is sufficient increase in power to cause the clutch / torque converter to slip....

As for Texaco fuel. I've always been impressed with Texaco. The performance and economy has been good, on a number of vehicles, over the years. Including the F2. Unfortunately there are no Texaco garages anywhere near me, so it's an 'on holiday' fuel. In fact, apart from one Jet garage, I have to travel nearly 10 miles for any branded filling station. So the cars tend to get filled up when we're passing somewhere near......

Had a butchers at their website and they do a premium diesel so will use that

Agree with the revs comment, that's nonsense and technically impossible, 70mph is achieved when the engine turns the driveshaft at a certain speed, always the same speed, the only variable would be a change in wheel diameter that could cause a rev change.

BarryKey wrote:

I've been running a trial on V-Power for the last 5 tankfuls. Am getting 36 mpg and between 530-560 per tank

I agree with the calculations you have done but average fuel is working out at 36. I get 530 by adding miles travelled to range. I never run to empty though. Refills normally happen at 430 ish Comments appreciated re revs. Just seemed that way on rpm counter. Surely if torque converter was slipping MPG would go right down. Thanks for comments. 12MY 61plate FL2 TD4 auto GS Orkney Grey Roof spoiler full size spare

Gone 07 Dodge Caliber 1.8 black
51 Nissan Primera
K Isuzu Trooper 3.1 SWB Citation

Ok, I filled up with shell fuelsave diesel, I haven't done any real calculations but according to my road trip app I'm roughly 2mpg better than my previous fill ups using sainsburys jungle juice. My average is now 34.5mpg rather than 32.7mpg, I don't know if this is in my head and I have subconsciously been driving more economically than normal, so I have fuelled up again using shell fuelsave diesel and will monitor fuel economy closely. 21MY Defender 90 S 3.0 D200

Might have to try it, my SD4 is currently averaging around 32mpg on 24,000 miles. What's the mileage on yours now?

Don't forget that just because a garage says it sells a particular make of fuel means nothing. I was once in an Esso station and commented that a Texaco tanker was filling their tanks. The guy said yes it looks like it's Texaco this week, depends on what's cheapest when the boss puts the order in! And do you really think that Tesco has it's fuel specially blended?

No, but Tesco also don't add any additives, not all diesel is the same, with Esso, you didn't get any foam when filling, where as Shell there will be a bit of Foam on the top. p****d off with a Digital Keyboard Warrior

chrisr1806 wrote:

Might have to try it, my SD4 is currently averaging around 32mpg on 24,000 miles. What's the mileage on yours now?

1374 need to get out more. 21MY Defender 90 S 3.0 D200

Just think, your car will stay newer for longer! I'm surprised at my mileage this year. It's normally around 8,000 a year.

j77 wrote:

Ok, I filled up with shell fuelsave diesel, I haven't done any real calculations but according to my road trip app I'm roughly 2mpg better than my previous fill ups using sainsburys jungle juice. My average is now 34.5mpg rather than 32.7mpg, I don't know if this is in my head and I have subconsciously been driving more economically than normal, so I have fuelled up again using shell fuelsave diesel and will monitor fuel economy closely.

I've read the discussions re quality fuel v cheap fuel with interest and also the addition of 2 stroke oil. which I have been doing for the last 5 tanks of fuel.

I cannot say that I have noticed any increase in MPG as a result of the 2 stroke.

This week we took the caravan 125 miles down the M5. Going I averaged 23.2 MPG travelling at 60mph as far as possible.
Before return I filled up with Shell+nitro (and wept at the cost) BUT averaged 28.5 MPG, again travelling at 60 mph as far as possible.

I am truly surprised and a little unbelieving!

I realise there are many factors apart from the fuel that may have added to this difference but I now intend to use the Shell fuel for a while to see if I can achieve the same increase in MPG in everyday driving because if I can, the use of the Shell fuel will obviously actually cost me less than supermarket fuel per mile.

After starting this thread some weeks ago an update - having run the FL2 exclusively on Shells nitro premium diesel and it has resulted in a 3 to 4 mpg inprovememt as well as better running and pull, solo or towing a 1400kg caravan. I think I'll stick with it. The price premium is a little painful but I feel, worth it.
On anther note, in a previous life, I worked for Shell Chemicals in a lab attached to a production unit making what they collectively called functional fluids - brake fluids and antifreezes. Without being biased, what they made and sold as DOT 4 spec brake fluid ( the best at the time) was far batter than it needed to be in most of the key parameters like boiling point and sediment content. I also used to get sight of development reports from the Shell research labs comparing their lubricating oils to supermarket and own brand offerings. Whilst the cheap stuff met the required specs it was often blends of high spec material and low spec meaning the blended average met the laid down requirements. Quite an eye-opener. FL2 2007 57 GS
D2 2005 Td5 - gone and not missed
FL1 2005 Td4 - gone and missed

If you can get a 10% fuel saving - in my case less than 3 MPG, then the extra 8p - 10p for the premium nitro+ actually becomes a reduction in overall costs.

Since posting about the trip to Devon I have reset the trip computer and my overall MPG is slowly increasing now standing at 33MPG which it normally only does on longer journeys when I can get around 36 at 60mph. I am intrigued to see what happens over the next few weeks / refills.