Premium fuel - will it really improve my economy? | Ask Honest John

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Premium fuel - will it really improve my economy?

Following your advice, I filled up with Super Unleaded and was slightly disappointed to find I only got an extra 20 miles out of my 40-litre tank. I have filled up a second time, this time with Shell V-Power, and will check again. But I was wondering how soon I should start to see a difference in petrol consumption?

Asked on 13 May 2014 by EMC15

Answered by Honest John

Well that's an extra 2-3mpg. It should improve to 4-6mpg after a couple more fills, but only if you use the extra torque at low revs to change up earlier. Carry on driving exactly the same and you won't see much improvement.

Tags: fuel economy performance fuels

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