Not sure about the lowest mpg but very pleased with my 3.2 TT yesterday on a road trip to Bedford TT shop, I managed a very good 40.2 mpg at a steady 60 mph, not bad for a pocket rocket gas guzzler lol,
Sorry it's a bit blurred but it was a sneaky pic while driving, Naughty I know!
Apologies for the swerve and back to you're question, I've never seen mine do that low before, strange!
Cheers Jeff
Sorry pics the wrong way up, not sure what happened there.