Quote:
Originally Posted by HO455
This quote is more than 15 years old and at the time it was controversial. (See first link) In the time since it was originally published the API ( Starburst logo) has change the specifications for oil at least twice. (See second link)
So in answer to the OP's question. You should run an oil with higher Zinc.
I also recommend not running an Zinc additive in your oil unless you are a chemical engineer. Better to have an oil and Zinc/phosphorus package designed from the ground up to be chemically compatible under all conditions.
https://www.bobistheoilguy.com/forum...Number=1165736
http://www.pqiamerica.com/apiserviceclass.htm |
Your point about mixing your own makes good sense to me. If I remember right, the link I posted above says over 1400 zinc parts per million (PPM) damages the engine. I run Mobil 1 5W-30 only, which is 900 PPM.
On a side, my engine speaks to me when she likes her liquid, and it purred best on 20-50 Durablend. Only 750 PPM I see. I'm no expert by a long shot, but I can say my cam looks great after 40K miles. I switched to Mobil 1 last two oil changes, simply because it was recommended by a few and Durablend became a pain to buy.