Shell V-Power diesel
- Thread starter hmallett
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Shell V-Power diesel
i was wondering how long it would be, take more than v power to get anything out of a diesel 
nah joking, great idea, specially with the amount of performance diesels around
nah joking, great idea, specially with the amount of performance diesels around
ah dont tell us if you girl friend got home safe or nothing
do you get free stuff with it?
do you get free stuff with it?
I would wager that won't mean anything to most people here.ah dont tell us if you girl friend got home safe or nothing
What sort of free stuff are you expecting to get with fuel?
H
Trying it right now, economy has dropped though...?!
she in bed now i heard
i got key rings with v power petrol,red ones, i would think you would get black ones!
i got key rings with v power petrol,red ones, i would think you would get black ones!
I got a free V-Power keyring when it replaced Optimax. Never mind that I've not bought any petrol since I bought the Panda a year ago!
Not many place sell the V-Power diesel.
Paul, what's the cost difference between normal diesel and V-Power diesel?
H
Not many place sell the V-Power diesel.
Paul, what's the cost difference between normal diesel and V-Power diesel?
H
I paid 89.9 for diesel extra but it's a brand new Shell station so they only have that at the moment (?!) so no direct comparison! Cheapest diesel about the same time here at asda was 88.5. I can't do a proper comparison until I start my commute up again.
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I wanna try some. There are no stations anywhere near me
Ah sorry, misread the post. So Shell have stopped selling Shell Diesel and now call it Shell Diesel extra? I assumed it was a slight premium fuel due to the fact it was sold along side Shell diesel and had a posh name...?! I also read the shell site before I bought and it had additives and a higher cetane value, hence the confusion for me.
i got a load last time i went to ace, but i gave them all away when i got there because they are girls ones
we sell loads of it at teh garage because the normal diesel runs out within 36-48 hours of the tanker being there.
so people are forced to buy it or face the aa man with his £30 gallon
so people are forced to buy it or face the aa man with his £30 gallon
For the most part Shell Diesel was replaced by Shell Diesel Extra. There are still a few garages that sell the normal diesel. Or at least there were last year, Diesel extra has been out a few years now. The idea being they give you the cleaning additives and slightly higher centane value 'for free'.
V-power diesel is the market rival to BP Ultimate Diesel. As a V-power club member I received leaflets offering extra points if I bought v-power diesel... shame all the outlets are down south, and the marea is off the road.
tried this new shell stuff and not impressed am getting better mpg on texaco diesel.
It's not for better MPG.. it's about performance. What model did you try it in?
I can only see words on the Shell site though, similar words to that used by Shell for Diesel extra and probably every fuel company in the world. No stats at all
cetane is how combustable diesel is when compressed, higher cetane means its easier to combust. therefore a higher cetane fuel will not give more power, it will simply make it easier for the engine to achieve combustion. unless engines are adapted to make use of diesel that is easier to combust there will be no benefit. you could argue that it will be possible to inject more diesel if it has a higher cetane rating because you might as well make use of all the compression the engine can achieve, and more diesel means more pressure in the cylinder when it combusts, but the limits of oxygen requirements cancel out any possible gains here, and also the fuel injection will not consider a higher cetane fuel is in use unless the ecu is remapped to compensate for it.
for all standard diesel cars the engine would still only be able to combust as much diesel as before, yes it is easier to do that, but the amount doesnt change. changing the cetane rating does not affect the pressure created in the cylinder, it only makes it easier to cause combustion. so its common sense that the power and torque figures should not change.
if we then remember that an engine's efficiency will impact the actual performance, and the efficiency of a diesel engine will be improved if the diesel is easier to combust, then we expect to see an improvement of performance. this is why a cetane rating of 40 would show a noticable loss of performance compared to a cetane 50 rated fuel. however once you go past cetane 50 you see no improvment, that is well know and proven. standard diesel is usually in the lower 40s, while the better stuff is in the higher 40s. if shell v-power is a 50 cetane fuel then it is the best you can get. but you also need to remember that the differecne in performance between a low 40s diesel and a 50 diesel wont be very noticable because the engine management is designed to use a low 40 cetane, and so the fueling is adjusted to match that level of combustibility. if you remap the ecu to be dependant on a higher cetane then you can unleash far more of the possible performance gain, but the difference between a standard diesel in the low 40s and a perfect diesel at 50 will not be huge no matter what car or setup you consider.
for all standard diesel cars the engine would still only be able to combust as much diesel as before, yes it is easier to do that, but the amount doesnt change. changing the cetane rating does not affect the pressure created in the cylinder, it only makes it easier to cause combustion. so its common sense that the power and torque figures should not change.
if we then remember that an engine's efficiency will impact the actual performance, and the efficiency of a diesel engine will be improved if the diesel is easier to combust, then we expect to see an improvement of performance. this is why a cetane rating of 40 would show a noticable loss of performance compared to a cetane 50 rated fuel. however once you go past cetane 50 you see no improvment, that is well know and proven. standard diesel is usually in the lower 40s, while the better stuff is in the higher 40s. if shell v-power is a 50 cetane fuel then it is the best you can get. but you also need to remember that the differecne in performance between a low 40s diesel and a 50 diesel wont be very noticable because the engine management is designed to use a low 40 cetane, and so the fueling is adjusted to match that level of combustibility. if you remap the ecu to be dependant on a higher cetane then you can unleash far more of the possible performance gain, but the difference between a standard diesel in the low 40s and a perfect diesel at 50 will not be huge no matter what car or setup you consider.
Ah but you're forgetting that under heavy load, diesels have poor combustion percentages, hence higher cetanes may help lower unburnt fuel values.
up to 50 cetane yes, beyond that it makes no difference.
