I have a 2005 TDI Audi 2L TDI - runs 50-80% BD and runs like a dream - 45K km and not a problem

I make & wash and I am totally responsible for my own quality control.

One batch of water from any fuel can undo an engine - al ot more data is required before pointing the bone.

When all the manufacturers say no BD it is the fault of people who make or buy crap fuel - it happens - goto TDI club - heaps of data there. Guys who blend petrol and vegie oil and call it bio fuel & heaps more!!!

New engines are sophisticated and require quality fuels which meet certain specs. When in doubt, buy and old Merc or indirect toyota - they burn almost anything!

Cheers,

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Paul
Brisbane
80 series TDi with 100K on B100
2005 Audi A3 TDi B20-B50 60K on BD
1993 Daihatsu Rocky - B100 20K on BD - all good!