I am not getting any black smoke or puff but my tractor is new.
Not sure where people get this thinking as fuel prices are mostly dictated by commodity prices, e.g. oil. Having been a trader in past life on commodities, oil and gold were two that I stayed away from my clients. Instead I would help them invest in shares of companies that participate in related industries as they were a bit less volatile. I just wish people would educate themselves on fuel prices and other things than stating opinions that are incorrect.