Www.nissan-navara.net 17th Jun 09 2008 D40 Auto with 10k on the clock. So far, in order of testing……… Solo (unchipped) 21mpg Nav now DTUK chipped, Map 1, 0%. Towing a 5th wheel .Edinburgh to Cheshire (M74M6) @ 58MPH14.6MPG Solo 2223 MPG Nav now DTUK chipped, Map 4, +20%. good performance, no smoke Solo 24-25mpg Towing my Abbey Spectrum (1850kg) twin axle yesterday to new owner. 19.6mpg @ 55mpg I’ll find out if there’s a noticable difference using a different map towing my 5ver this weekend when we go away for our first break