Bruce, with my car, E46 325i 2003 model manual, I got 6.8l/100km on my trip to Uvongo last year. This included full boot, mommy and the 2 kids, plus the chihuahua, and I stoppped EVERY 45 minutes about for the kids and dog to pee... :facepalm:
Also when leaving the toll gates, I would push my car hard if you catch my drift, and also the last 1 1/2 hours I drove the R56 and the R612 instead of the N2 and opened my baby up doing some low flying... :mmm:
...anyway, so yea, I got 6.8l/100km.
Trip back, when stopping at my house, total +/-720kms, on one tank, got 7.1l/100km.
Best ever was 3 years ago, from Pretoria to White River in Nellspruit, got 6.2l/100km there and back.