My first tank full of Shell's finest (compared to my usual BP finest) returned exactly the same mpg, and I'm now on my second tank full. I'm going to use Shell for 3 fill-ups and then report on the results.
Those comparing 'cooking fuel' with the higher octane stuff are bound to notice an improvement, so I hope my little test will compare 'apples with apples'.
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2002 Final Edition S8. Ebony black with Silver Grey leather and myrtle wood trim. Current mods: solar sun roof, 20mm rear spacers, 15 mm on front, red brembo callipers, 6k headlights, rear view camera, engine remap, alloy dash dial rings, alloy navi rings, tt/phaeton pedal upgrade, (and custom matching foot rest) dension ipod interface & parrot hands free kit (both fully hidden), av input, tv in motion switched thro' PF switch in blanking plug right of steering column, Audi 'quattro' sill covers, repositioned centre console switches, radio clock, .
Planned mods: auto-dimming rear view mirror, dash cam (as steamship's), fit the ski hatch, refit philips drl's (or maybe not - nope, definitely not - horrible botch!).
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