I get about 160 miles to ?30 and thats town driving, no plenum rattles and vis motors seem to be working as i found out in the wet when i hit the first surge in second i lost all traction
Been driving around with duff VIS for a while I am sure. Bought a pair of new VIS and made a 300 miles round trip in 1 day down the motorway to London and back. Brimmed it and calculated 34MPG on my trip.