[nine_k]

...which means that oi consumption rises slower, not that it decreases, doesn't it?

[marcosdumay]

No, the article is very clear, right from the introduction that they are burning less oil as fuel in total.

It also says they used more oil in total, pushed by applications where it's not burnt. But that number is incompatible with other sources, so there's probably some totaling errors there.