Just been out for a drive,some motorway,country roads driving bit like miss daisy but not really trying too hard just got 40.1 mpg (only ever got 38mpg in my previous works S)
GTT 210 kit + one ball +GTT air filter + GRS intercooler (Im an old fart as well

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Always around 350-400 miles per tankfull (optimax or tesco 99)