Originally Posted by HBar50
"Farm Diesel" = Off Highway use diesel, red dye. Same as recreational marine diesel. Until recently had a higher sulfur content. As not as much is sold at the gas station may be stale and already have the diesel bug.
Recreational marine diesel = the same fuel, although some vendors (Valvetect, etc) add an antimicrobial additive to kill the diesel bug. Red dye (No highway tax)
This is correct off road diesel is the same as on-road. The dye is added by the distributor as are the ValvTect products. A few years ago there were differences because off road was LSD and on-road ULSD but now all are are required to be ULSD.
The distributor up this way, who supplies most of the marinas, pulls the same fuel from the same tanks but off road gets red dye and ValvTect dealers get the ValvTect additives... The dye is only there to signify non-road taxed fuel.
As for diesel bug many marinas turn fuel over at a faster clip than a station selling diesel, unless its a truck stop..