[Joseph Martin]

Originally Posted by magnuz

One thing that bothers me is that my car has been running on normal unleaded for 20 years, which will probably have impregnated the rubber seals to some extent, if you then start using something different, it may cause the seals to harden,& fail.!
Saw something similar, when a mate of mine decided to start running his old diesel transit on used chip oil, it then kept springing one leak after another & eventually ended up having his diesel pump rebuilt !

Yes, I must admit, I do share similar concerns re the new E10 fuel. I was having a conversation with my neighbour regarding this very issue as he pointed to my 1988 360 and asked 'will that be ok on it?'
My 850 TDI has been ran on veg oil prior to my ownership, and it's possible that the pump needs doing on it at some stage. My 1999 LDV Convoy recovery truck with the 2.5D Ford engine possibly has in the past as well, as it has been a challenge to get it running well in the near-zero years I've owned it.