I'm using the Lucas engine break in additive. The bottle is 16 oz and which contains 31,000 ppm of ZDDP. When added to 4.5 qt. the zddp content is at 5000 ppm. Now what would the zddp content be (at same rate) in 6 qts.? I have looked up calculations, but I just can't figure this out lol. Thanks for the help!