They should sponsor B10 Diesel and do 100k km test on :
1. Commercial vehicles such as busses and lorries
2. Pick up trucks
3. Industrial machinery (looking at a pre-defined number of operating hours)
4. Gen sets (looking at the pre-defined number of operating hours)
5. Lastly, the cars such as BMW, Ford, Audi, Mercs etc
make this study extensive and transparent. If it works well with no ill effects on these engines, no one can argue. They have to get manufacturers such as BMW to agree that it will not void the warranty. Then should not be an issue.