Back in the day the owner operators that ran with us company guys used home heating fuel... till they got busted... At my company now , we have a 1000 gallon tank on site that is filled every other day by an outside source... One of our trucks was dipped and a trace showed on the stick.... the fine was in the drivers name and was for $3500.00... The fuel company we use stepped up and paid the fine,, they paid for all our trucks to be flushed... turns out that the driver delivered home heating fuel before our diesel and he drained but did not properly flush his internal system.....