On Friday, 9 October 2015 12:43:07 UTC+2, wrote:
On 09/10/2015 09:08, Stephen wrote:

What is the best and safest way to dispose of the old petrol?


Pour it into an old metal dish (baking tray?) and set fire to it in the
garden - a complete non-event provided obvious precautions are taken
... an opportunity for natural selection to come into play ;-)

Having seen the burnt legs of somebody who came bloody close to need a
skin graft after trying to get a barbecue going with petrol - I really
can't recommend it. He did *not* pour the petrol on the BBQ, he some
charcoal lumps in a bucket and poured some petrol on those (some way
from the recalcitrant fire). The trouble was that the fumes flowed out
of the bucket to the fire, ... and then caught fire - all the way
back to the bucket.

Really - don't do it!