My B21 doesn't like ULSD fuel

   / My B21 doesn't like ULSD fuel #21  
What about Off Road Diesel is it also ULSD ????
 
   / My B21 doesn't like ULSD fuel #22  
What about Off Road Diesel is it also ULSD ????

YES That has been noted many times. It's all the same, they just add the red dye to the off road stuff.
 
   / My B21 doesn't like ULSD fuel #23  
On the ATF, I used to have a 87 euro spec Mercedes 300D 6 Cylinder non turbo, when I added a half pint ATF to a full tank the injector knock/rattle was much less after treatment - in fact when the engine was warm it was almost as quiet as a gasser.

I added ATF several times a year and never seemed to cause any problems and made it smooth and quiet.

Interesting article - I think I will find some opti lube for my B21 too.
 

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