So Jim my question is, when you use a zinc adative what oil do you suggest a person use. Are you talking about using a none detergent oil when using a zinc adative. The reason i'm intrested is i had my cam go flat in my Elky, it was in the engine for over 6 yrs. I changed the oil and in a couple weeks it went flat. I've now changed the cam and bought Lucas zinc adative, but i used a 10X40 oil with the supplement zinc. Did i waste the $12.00 on the zinc or should i change to a none detergent oil with another pint of zinc. I've only ran the engine about 1 hr since putting it back together and i don't want this cam to go flat like the last one.
As far as cams going flat i've got a friend who run a sprint car and he has has atleast a 1/2 doz. cams go flat (rules dicate a flat tattet cam)and as you said some on the test stand. The cam manufauturers just say o'well.
Zip.