I just changed my oil, used valvoline VR1 20w-50 with a bottle of Redline Engine Breakin lube.

From Redlines Web Page
"Bottle (16oz) contains:
33.8 grams total ZDDP (zinc dialkyldithiophosphate)
17,000 ppm, 7.8 grams Phosphorus (P)
20,500 ppm, 9.4 grams Zinc (Zn)
16.6 grams Sulphur (S)"

Increases of antiwear per quart by using one bottle (16oz.): Oil capacity:
Phosphorus Zinc
15 quarts 610 ppm 736 ppm
12 quarts 763 ppm 920 ppm
10 quarts 915 ppm 1104 ppm
8 quarts 1145 ppm 1380 ppm
7 quarts 1307 ppm 1577 ppm
6 quarts 1525 ppm 1840 ppm
5 quarts 1830 ppm 2208 ppm
4 quarts 2288 ppm 2760 ppm
1 quart 9160 ppm 11040 ppm

Half Bottle (8oz.) When Treating:
12 quarts 382 ppm 460 ppm
10 quarts 458 ppm 552 ppm
8 quarts 572 ppm 690 ppm
6 quarts 763 ppm 920 ppm
5 quarts 915 ppm 1104 ppm
4 quarts 1145 ppm 1380 ppm