Just been trying an experiment with fuels again.When i had my volkswagan golf (diesel) i noticed when towing if i put in shell diesel i got more power but less mpg.If i used Esso more mpg but less power,supermarket fuels were just a joke.With my present car its the same.The point im trying to make is,i feel certain engines run best on certain makes of fuel.If you have say a Kia diesel then,this may be suited to BP rather than the two ive mentioned or evan the supermarket stuff.
I know they add additives to fuel but,other than that i feel the engine too has a lot to do with it.
find mines running ok on tesco fuel over the last thousand miles approx , no noticeable loss of performance and OBC reading 56.7 mpg average over the thousand miles.
tesco £1.259 /litre with promotion as opposed to shell / jet £1.349 / litre
happy with that
I tried the super fuels at one point and it made no difference except it burned away quicker compared to a standard fuel.When i stuck supermarket fuel in,it was ill, rattling valves,misfiring and poor mph,yet it seems not to bother other engines..
i thik the fuel comes from the same refineries,the only differance is the name on the tanker that delivers it.
------------- its easy enough to be pleasant when the world rolls along like a song.but a man is worth while if he can smile when every thing goes f------ wrong.
Quote: Originally posted by lion123 on 14/7/2012
i thik the fuel comes from the same refineries,the only differance is the name on the tanker that delivers it.
It does in scotland, all comes out of grangemouth,every company tankers fill out of the same tank
Quote: Originally posted by diesel steve on 14/7/2012
Quote: Originally posted by lion123 on 14/7/2012i thik the fuel comes from the same refineries,the only differance is the name on the tanker that delivers it.
It does in scotland, all comes out of grangemouth,every company tankers fill out of the same tank
The base fuel comes from the same refineries, but the branded fuels have additives put in the tanker before filling.
Whether petrol or diesel, I have always found branded fuels to give about 10% extra mpg (as well as the engine running smoother), so actually work out much cheaper than supermarket fuels (especially when local garages are often only 1p a litre more than the supermarket). If you've always used supermarket fuel, it will take about 3 tankfuls before you notice any difference, but I never use supermarket fuels anymore.
I have said for many years that supermarket fuels provide less miles to the gallon that proper branded fuels. The problem with people that disagree with this don't actually do their homework correctly as they always say...Well I put a tenner in and done this trip here and that trip there etc. etc. etc. without any proper calculation at all. There is only one way to prove it and that is to fill the vehicle fuel tank to the top, set the trip to 0000 and do the long trip. Re-fill to the top again and see what the amount of litres is in total against the miles covered. Divide by .22 and this converts litres to gallons used. Do the same with branded fuels and I find that the fuel used is always less. It's impossible to debate the issue unless you have the tested proof.
Quote: Originally posted by tango55 on 14/7/2012
I have said for many years that supermarket fuels provide less miles to the gallon that proper branded fuels. The problem with people that disagree with this don't actually do their homework correctly as they always say...Well I put a tenner in and done this trip here and that trip there etc. etc. etc. without any proper calculation at all. There is only one way to prove it and that is to fill the vehicle fuel tank to the top, set the trip to 0000 and do the long trip. Re-fill to the top again and see what the amount of litres is in total against the miles covered. Divide by .22 and this converts litres to gallons used. Do the same with branded fuels and I find that the fuel used is always less. It's impossible to debate the issue unless you have the tested proof.
Agreed, those onboard calculators are mostly useless and very flattering - maybe the car manufacturers want us to think their cars are more economical than they actually are However, it wasn't until the third tankful that I noticed the difference - probably because the first two tankfuls were cleaning the fuel system out - been saving money with proper fuel ever since
I can never understand people's reluctance to try it. It might cost an extra 1 or 2 pound to fill up, but you'll effectively be saving more than the price of a gallon each time - you know it makes sense
Even brim to brim tank tests on the same routes not prove anything as the conditions can be different.
I have found the premium stuff works better on mine, but if you start to collect live data from the car over a period of time it all just works out around the same.
The key part is the additives, depending who you buy from, you get less or more...
If we were taking about the Research Octane Number doing compares, now thats different as you can get more power and different MPG's, but you need to be dyno'ing these figures when the cached is cleared on the ECU's, injectors etc..
My tip... just use what you think is best and theres never a right or wrong answer unless your a running a race car.