On 15 Sep, 22:03, Roger wrote:

Diesel tractors don't run very well on petrol. :-(

They run fine on a mix of 1 petrol : 10 diesel, or up to 1 petrol : 3
diesel if pushed. In cold weather this is even standard practice
against waxing.

Diesels will also run on a mixture of old unleaded petrol, whilst
petrol cars are getting fussy about the poor storage qualities of
unleaded.