We were somewhere around Barstow, on the edge of the desert, when the
drugs began to take hold. I remember
saying something like:

Ive just put 2 litres of perol in my diesel tank. i filled tank right
up with 70 litres of diesel in the hope that the petrol will be on the
top and i can syphon it off .

Advice please

No advice needed. Just drive it.