On 21/08/2015 09:13, charles wrote:
In article , Andrew Mawson
wrote:
"NY" wrote in message
o.uk...

"dennis@home" wrote in message
eb.com...
On 20/08/2015 22:19, Bill Wright wrote:
An expert that I trust says that supermarket fuel isn't as good as
other fuel. He says it's all down to the additives.

Comments?

Bill

Ask the expert what the others put in that the supermarkets don't and
you will have your answer.

Has anyone (eg a motoring organisation) done any comparisons on mpg and
general smoothness of engine (difficult to quantify the latter!) for
various brands of supermarket fuel versus various brands from named fuel
chains (Jet, Esso, Shell, Texaco etc)?

The only time I've noticed a slightly smoother engine (though no
significant improvement in mpg) was when I accidently filled up with
premium diesel instead of standard diesel - and a lot of that may have
been wishful thinking to compensate for paying through the nose for the
"gold plated" fuel :-) I wouldn't have minded quite so much but I'd
driven past loads of garages on my journey, holding out for the
cheapest garage that I happened to pass, and then when I found a cheap
garage I went and used the premium holster instead of the standard one.
Shame they aren't different colours (eg black versus black with yellow
stripes, or something like that).

Many years back, the father of my then current girl friend was adamant
that he would only use Shell, and never BP as his Rover 110 went so much
better on it. I wasn't popular when I pointed out that (at the time)
they shared a delivery fleet and the same tanker delivered both so they
were the same.

Point of the story - it's very subjective and the judgement is coloured
by preconceptions.

Like the Austin/Morris arguement

The Morris / Austin argument was also fuelled by having differing ranges
of accessories.