if you want the engine of the thieves car totally fooked then add a drop of cosil D into the drum i'm talking a cap full or slightly less, this is an acid for silage to stop it turning bad at the pit edges, it will sieze the engine, the way it was found out was that a farmer near me run out of diesel in the field and had the empty drum of cosil D sitting there so took it to the filling station to fill the drum however a tiny ammount of it was still in the bottom of the drum, he emptyed the drum of diesel into the tractor to get it home to fill and about 5mins down the road the engine siezed, i