I always use a premium diesel because with my previous car, which did not have a particle filter, I had noticed much less black smoke on hard acceleration. In fact I had complained to the dealer about the smoke under acceleration and was told "They all do that". My preferred diesel is Q8 Hi-Q and other than a cleaner exhaust I think I get a slightly better consumption. Given the obviously cleaner emissions I have even wondered why this grade of diesel is not obligatory for diesel cars.

For the Morgan I often use the premium super but I really don't notice that much difference. I generally avoid the E10 petrol which is commonly available in France but I do occasionally use the E5 fuel which is available locally.

I am convinced that high ethanol fuels are not really suitable for use with older components, such as fuel lines etc, that where not manufactured to be resistant to ethanol.

Peter

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