11-07-2019, 10:14 AM
Steve,
I don't think 45-50mpg is a realistic target for a Ruby; don't forget the Ruby is at least 2cwt heavier than the Chummy that would have been the test car in Bill's statistics. 37mpg sounds quite reasonable for a cross-country run; you might expect that to improve on a long main road run with 45-50mpg achievable under ideal conditions. I have achieved close to 60mpg on occasions with my RM, but as Dave says, this can soon drop well below 40mpg on a more challenging route.
I don't think 45-50mpg is a realistic target for a Ruby; don't forget the Ruby is at least 2cwt heavier than the Chummy that would have been the test car in Bill's statistics. 37mpg sounds quite reasonable for a cross-country run; you might expect that to improve on a long main road run with 45-50mpg achievable under ideal conditions. I have achieved close to 60mpg on occasions with my RM, but as Dave says, this can soon drop well below 40mpg on a more challenging route.