I have heard that the new diesel fuels dont offer much lubrication for injector pumps. I just replaced mine after 98000 miles. Is there any lubricant additive? I have heard everything from transmission fluid to motor oil to Marvel Mystery oil. Does anyone use any of these with good results?

 

welcome to DF!

the MMO plus PSD (power service diesel) is supposed to help the lift/injector pumps with lubrication (from the mmo). I use this mix in my tank almost everytime.

 

you cant go wrong with drew's brew!