I don't drive very much, though. 10 km to work and back along country lanes, shopping into town once a week and the odd small trip at weekends.
One tank lasts about 5 weeks
On the last filling I put up some more dual carriageway kilometers than on the previous one (as the cat had a daily vet visit for the week) ..so that could explain the improvement (or not). Also, I said above, brimming a syncro is a bit hit and miss. So ..the previous high values could also have been wrong.
In short ..I can't guarantee any reduction as this isn't a scientific experiment.
What I can say is that the engine sounds a lot "happier" and that alone does it for me.
BTW ..2-stroke oil (as opposed to engine oil) is designed to burn off rather cleanly and with the small amount of it in the mix I haven't noticed any difference in the exhaust, certainly no oily smell or fumes.
I know what 2 smoke is supposed to do... I have bikes too...