Should I be filling up my new diesel engine with the more expensive "low sulphur" stuff, or will good ol' regular diesel suffice? Is it just a marketing scam, or will the low sulphur stuff really protect the engine, make it do more mpg,... etc?
In the 5 weeks that I've had the car i've alternated between regular diesel and the low sulphur stuff at fill-ups. Getting 38.2mpg, which I think is OK seeing as most of the car's use is high speed motorway.
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i have used tescos finest from new now 6 years old have used red line 85 plus in fuel it has breezed through the mot,s.
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I thought it had all been ULSD for 6 years.
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All the diesel I fill up with says it is low sulpur.
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