[Kid1956]

In the trucks, we used to use PS, white in winter, silver in summer. Then Lucas came along, and now only use it. In the Duramax, 1 lucas every 3rd tank, and always put 1 in the xtra bed tank, as it sits waiting on those long no station stretches, so might get some moisture. I also run the CAT adaptor and filter, as theyre 20$, instead of $45 Delcos, and lots better. Check out the Dmax store for duramax info, best there is,, thats all they do, really good people.