Found on http://flaviogomes.warmup.com.br/2013/11/one-comment-535/
BJ has a take on it, that it's about incredible gas mileage:
The fuel tank nearly full (nearly full all the time), the tightened belt (an allegory to frugality, ) the melting gas lorry ( no longer needed or used) the worker in overalls ( no longer able to work because of the low gas consumption) empty pulled out pockets (same) the oil rigs used as flower pots (repurposed and useful since they no longer need to pump out the oil) the ants in the foreground (.....) well that's just weird...
