Viewing 3 reply threads
  • Author
    • #57805

      I have been using 20W50 in my 1600 engine for years, but I have just gotten a 1725 and was wondering if 20W50 is the stuff to use or should I use 10W40?



    • #64356

      I use 20w/50 w oil. Your biggest concern is to make sure the oil you use has high levels of zinc in it. The only affordable oils I have found locally that still have zinc in it are Valvoline VR-1 racing oil and some Kendell GT-1 oils.

    • #64358

      If you can locate a place to buy it, Brad Penn has a high zinc dialkyldithiophosphate content oil. (Previously a Kendall refinery in Bradford, PA.) I’m running Brad Penn in a few of my cars now.

    • #64363
      Bob and Jean Webb

        shell rotella t 15/40 still has 1200 ppm of zinc . or you can go to your local auto parts and buy 4 oz bottles of zinc additive.

    Viewing 3 reply threads
    • You must be logged in to reply to this topic.