New forum user here, My question is what would the best additive to use? I have a "2020" HD2500 I bought brand new, and i had to bring it to the dealer yesterday 2/16/20 because my auto start (keyfob/phone app)
would not work, and my check engine light was on too, long story short and they asked me if i used any additive at all? (no) they said my diesel filter was waxed up because of the cold so they are going to change the filter and put in 911 and for me to use it during the cold months when it starts getting below 20 degrees, Now I thought that was only for emergency use? any advice would be appreciated....