Supermarket or branded fuel? The age old discussion!

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decipherxx
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Supermarket or branded fuel? The age old discussion!

Postby decipherxx » Sun Jun 19, 2016 8:13 pm

I'm of the opinion that supermarket fuel (diesel in particular) is the same as branded fuel. I've never had any reason to think otherwise but i'm looking for opinions. I'm not talking about 95RON vs. 98RON or anything, i'm just comparing bog standard petrol/diesel from say, Morrisons, to Shell.

What are your thoughts?

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Re: Supermarket or branded fuel? The age old discussion!

Postby alexperkins » Sun Jun 19, 2016 10:00 pm

The main argument boils down to the blend of additives in the different fuels from different places. Supermarket fuel normally has more additive in it vs that of branded fuel but it doesn't necessarily make any difference to performance or economy.

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Re: Supermarket or branded fuel? The age old discussion!

Postby bvs » Thu Jun 30, 2016 10:30 am

I uaually buy branded fuel - not necessarily because I expect better mpg but more for fuel quality/pureness/quality control.
I sometimes use supermarket stuff if I get stuck.
Supermarket diesel may have more 'biodiesel' content (%) which is another reason I am cautious.

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Re: Supermarket or branded fuel? The age old discussion!

Postby bvs » Thu Jun 30, 2016 11:55 am

I have been trying to find percentages of 'biodiesel' in different brands of Diesel fuel - No luck with that - but found this BP info..
.
Normal Diesel sold in the UK

Composition/information on ingredients
Ingredient name
Petroleum distillates- % by weight 99
Contains: naphthalene- % by weight >1
May also contain small quantities of proprietary performance additives.


Ultra Low Sulphur Diesel sold in the UK:

Composition/information on ingredients
Ingredient name
Petroleum distillates- % by weight 90
Contains one or more of the following biodiesels: soybean oil, me ester
Fatty acids, sunflower-oil, Me esters >1%
Fatty acids methyl esters >1%
Fatty acids, vegetable-oil, Methyl esters rape oil, me ester >5%
Fatty acids, canola-oil, Me esters fatty acids, tallow, me esters >2%
Contains one or more of the following renewable diesel: Fuels, diesel, C9-18-alkane branched and linear >1%
May also contain small quantities of proprietary performance additives. >1%


So even with BP low sulphur diesel you are getting up to 10% 'biodiesel - I have seen posts by people with their own fuel testers who claim to have seen up to 18% biodiesel in some unbranded fuels (no names)

Edit - this info may be a little out of date but branded fuel should have less than 5% biodiesel in 'normal. diesel.

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Re: Supermarket or branded fuel? The age old discussion!

Postby wafflingsumo » Tue Jul 12, 2016 10:36 am

Branded. Purely due to the fact I've seen soo many cars with running problems due to water in the fuel from supermarkets :shock:


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