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Old 15th April 2008, 10:19   #4 (permalink)
Kremmen
Krem de la Krem
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Last year I tried BP Ultimate 97RON for about 4 weeks followed by BP Ultimate 95RON for the same period. Then I tried Tesco 99RON for the same followed by my old favourite Tesco 95RON.

Results - no difference

My trusty spreadsheet maintained a constant 39MPG throughout the experiment. During this time the trip computer insisted I was doing 44MPG but fuel put in versus actual miles covered proved otherwise.

I do 250 miles a week so I put in about ½ a tank each week which towards week 4 should have removed any 'mixture' of the various fuels.

I've now been running with Tesco95 for about 6 months with no problems.
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