Re: Replace Diesel Fuel Regularly
"They recommend at least every couple of years to drain all the fuel from your tank and start with completely fresh fuel."
Well, most "pump" fuels are designd to be used within 90 days of being pumped out, after that some fractions evaporate away (heptane and butane among them in gasoline) while others break down.
I can't see buying "a couple of years worth" of fuel or leaving it in the tank that long. Or if you think it might sit, at least add Satbilant or a similar product to the tank. But sure, if it has been sitting for a year or longer, you might want to take it to a service station, put it in the oil waste tank, and let it become heating fuel instead of trying to run your engine on it. 'Use it or lose it".