I have lately become a bit obsessed with mpg since my new car constantly displays the mpg I'm getting. It doesn't half change the way you drive!
This got me to wondering about the quality of the diesel I put in my car. I've always gone for the cheapest but last night the husband said that he seems to get more miles from a tank full of petrol from BP than he does from supermarket petrol stations.
So does this also apply to diesel? Do you get what you pay for? Are some diesel suppliers better than others? I'd be interested to hear what people have to say :-)
I was told that the branded fuels have better additives in which make the car run better and improve MPG. I've no idea how marginal this is on a modern diesel. I tend to use a BP station near us for the X Trail.
My company car gets filled up where the club card points come from though
My son is saving up to get a small off road 'pit bike' and the guy in the shop told us to steer clear of supermarket petrol as it effects how the bike runs and makes them difficult to start. Again I'm not sure if the same applies to diesel - rest assured someone will be along soon to advise further though
Did a comparison test with Tesco Diesel and Shell and found that in my Diesel Honda the day to day mpg hardly altered .
However when towing the van the mpg was slightly down with supermarket fuel but performance was unchanged
I've used supermarket diesel a couple of times and on both occasions thought I got less mpg even though I got more fuel for my money! Likewise I don't think the claims of extra mpg for the premium grade diesel ring true either. There isn't much choice of supplier round here, Shell or Sainsbury.
i would say a definete yes it does matter . i never these days go to the likes of asda or tesco under normal circumstances ( i will this week as i have a 10p litre off voucher from tesco's ) i find i get better mpg petrol and diesel from a local esso station ,but when i am out on my travels the best fuel comes from believe it or not a filling station at a garden centre ,the manager told me that quiet a lot of other people had mentioned the same thing ,better mpg for a starter and after filling up there the car takes off like a rocket ????? if theres anyone on here going up the wirral its the gordale garden centre ,try it
This supermkt vs branded fuels is an old chestnut. Branded fuels have additives, supermarket fuel does not apart from the winter additive in diesel to prevent waxing as required to keep within UK spec. All forecourt fuels must comply to UK spec so there is nothing wrong with supermkt fuel except that branded fuel contains additives that might improve mpg &/or keep fuel/anti pollution system cleaner. The specific additives are added at tanker loading stage, I think.
I notice in my area anyway that fuel prices have suddenly become more competitive & the branded forecourts are matching supermkt prices.
There's all sorts of urban myths about this. Some people have very fixed views about the quality of supermarket fuel and some claim better mpg on branded but none seems to have any definitive evidence and the process of getting this is quite difficult i.e from an empty tank miles covered vs fuel needed to refill. Then the same on the other type of fuel over an identical route. (need to drain the tank from the previous fill.
top gear attempted to do this once. Their conclusion was there's no difference but they are not noted for definitive scientific research.
I use Asda fuel.It's cheaper. How I drive the car will have a much greater impact on mpg than where I get my fuel.
The car will do 50mpg or 140mph or tow a caravan or transport 5 people. I don't believe where I get my fuel matters much to any of these things.
being a motor engineer i always use the best,yes its more expensive.the oil companies spend many millions on development of fuels.you may not notice any difference in distance but i believe it keeps my engine clean inside.at the end of the day you are saving on engine repair or future problems due to low grade fuel.i think it runs smoother too.my other half had a engine miss now and then when on choke.all checks found no faults.i asked her to change to the best petrol and it never did it again.must be somthing in it.
------------- the only silly question is the one you do not ask.
Definitely branded fuels for me. I used to use supermarket fuels (petrol and diesel), but found that branded fuels give me an average of 10% more MPG and make the vehicles run better/smoother. If you have been using supermarket fuels for a while, it may well take about 3 tankfuls, of the proper stuff, to clean your fuel system and produce the benefits.
As Tentz says, there is hardly any difference in price between branded and supermarket fuels, so give it a try - you won't be disappointed
Back in 2004 we had a new Vauxhall Zafira (1.8 petrol engine) and always preferred to fill up with branded fuels. However, after about 4,000 miles on the clock went to a rally about 150 miles away with a small 2 berth caravan in tow up the M1 to Hull. I filled up initially with a branded fuel locally and then re-fuelled at a Morrisons fuel station after approx. 125 miles into the journey. With only 10 miles to go to our destination an orange symbol (engine) illuminated on the dashboard but continued the rest of the journey. Once at the destination I called out the RAC to investigate and when the RAC patrol man arrived and diagnosed the problem, he recitified it and asked if I had filled up recently with supermaket fuel at all. Surprised at his question I answered yes and so informed me that the problem was just a speck of dirty fuel that had gone through the fuel injectors and registered the orange display. He advised me to use branded fuels because not only is it cleaner but will produce miles per gallon and ever since that day I have done just that and avoided supermarket fuels unless it's absolutely necessary. After taking his advice my mpg with the caravan in tow increased from 25 mpg. to 29 mpg. so the proof was evident. We have a local JET station and always sells diesel and petrol for exactly the same price as Morrisons so for me it's no contest anymore.
I don't know for fact but in northampton there is a BP distribution site, you see loads of BP tankers leaving to do there deliveries, you also see loads of sainsburys tankers and tesco etc.
I can't believe they have different tanks at the depot it all comes from the same tanks surely.
They all load from the same storage tanks & the additives for the branded fuel are added in the tanker loading process. The fuel in the storage tanks will conform to UK regulations regarding antiwaxing & antifoaming additives in the diesel but the brand specific additives containing cetane improvers etc will be added while loading.
with a petrol engine run the cheapest you can find unless it's a performance motor, with a diesel I would use branded fuel, on my car the EGR V/V chokes up pretty quickly on the cheaper diesel.
Geordie
I actually did quite a bit of research on this last year. The only fuel I found that gave a noticeable difference is Morrisons which gave significantly less mileage per gallon than any other. Interestingly, Morrisons claim their diesel contains 7% bio diesel, whereas the rest have the legal requirement of 5%. Ford recommend no more than 5% biodiesel be used in their TDCi engines.
There is a Tesco station near wear I work that sells diesel 1p a litre less than Asda 2 days a week, 1p a litre more the rest of the week. I fill up with whichever is the cheapest at the time but find no difference in the performance or economy of either.
The difference in fuel consumption between driving at 50mph and at 70mph is staggering though. I can get 60mpg at 50mph but only 48mpg at 70mph.
At the end of the day, there is no difference, except for the price, BP are over charging by as much as 10 P a litre or 45 pence a gallon. in most places
The government get enough out of us so why pay more than you have to