It's madness, really.
He's just spent two months in Brazil, and was outraged that he couldn't find any decent gear. 'It was all yellow and smelt of petrol!'
It always smells of ****ing petrol!
Also he managed to overdose on something called GHB whilst preparing himself for a visit from a hoor
I believe GHB is quite a powerful hallucinogen. People claim to experience their own death or some such **** while on it. Although how they'd know is an interesting question.
Since petrol is fundamental to the cocaine processing...errr...process, I fail to see how it couldn't smell of petrol, really.