First 1000 miles: no problems

Within EU the goal is to raise the level of biokomponent to 20% by 2020.
My test with old Jetta and almost as old biofuel goes on that level.
First 1000 miles is back with MSO:

Biofueltest goes on again

The biofueltest that was cancelled for wintertime goes again on. The first of May Jetta got new motoroil and oilfilter and mustard seed oil from the former millenium was added 10 litres to tank - 60 litres - of Jetta. Jetta had gained the mileage:

About 411750 miles.