just to add in that i only use supermarket fuel. - its all to EN590 standard.
and always have done.
its been fine in all my vans, for ever.
well over 500,000 miles now
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i get that some people like to use premium, and sure there is some additives in it.
but dont be put off - its all produced to a very specific standard.
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fuel contamination is a different issue, ie some old outback rural fuel station that has a rusted, leaking underground tanks that seeping water or rusting out.
but again the fuel stations have to live up to very strict standards.
so in my opinions the large supermarket chains have the budget and incentive to keep squeaky clean, . .
verses the local independent franchised brand name PFS.
i used to work as a security engineer at Texaco,Essex,Sainsurys,Tesco PFS for years - so have seen behind the scenes and have no issues with the supermarket stuff.
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as for additives,
petrol maybe a better fuel to take additives.
diesel maybe not so much? - but im sure i cant hurt.?
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