well my mrs did it, she put 5.75 litres of petrol in the Peugeot 306HDi, i brimmed it with 48.49 litres of diesel and that was on top of what was in there (i think its a 60+ litre tank)
it runs, and having never done this before do i need do anything else, apart from brim it again after about 70 miles?
it runs, and having never done this before do i need do anything else, apart from brim it again after about 70 miles?