or lifting the right foot off the carpet sometime's helps

,sorry couldn't resist ,i normally average around 28 mpg in the golf with very mixed driving normally nice and gentle on the way to work and a bit of fun on the way home i have had the trip computer read anything from 17 mpg to 42 depending on how it's driven or 10mpg on track days ,they can be animals if driven hard if it's under normal driving then get it checked out ta andy