With effect from 1 June 2016 the advisory fuel rates are as follows:

Engine type and size (cc)
Petrol1 Diesel LPG
<= 1400 <= 2000 > 2000 <= 1600 <= 2000 > 2000 <= 1400 <= 2000 > 2000
10p 13p 20p 9p 10p 12p 7p 9p 13p
Note
1. Petrol hybrid cars are treated as petrol cars for this purpose.

For 1 month from the date of change, employers may opt to use either the previous or new rates.

HMRC web posting 25 May 2016

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