So how much does this stuff cost and how much
oil is it supposed to treat? How does it compare to ZDDP? The ZDDP treated 5 quarts so I had to use two per
oil change. I ordered a six pack of the ZDDP to defray the shipping cost But it's avaiable on ebay and still around $8+ per bottle. Someone said to just use the purple breakin
oil.
I did notice that after I added the two bottlels of ZDDP that oil temps fell about 30° to 40°.