As promised, here are the exact amounts of booster needed, in a gallon of Rotella T6 synthetic or to a gallon of Rotella dino Triple Protection, to reach a desired concentration of Zinc in the form of ZDDP.  All the way from "adequate" (add nothing and you have 1250ppm) to a relatively HUGE 2500ppm    

Anyway.. I will attach the spreadsheet to this post (open office format, oops the forum will not let me attach a file with extension ods. Change the extension from zip to ods or xls. It is not really a zip file) so anyone can check my math or expand it out to Mountain Dew "extreme" zinc concentrations beyond 2500ppm.  

I have carefully considered the specific gravities of Rotella and each additive when calculating the zinc concentration. Sources for this as well as Zn contents are MSDSs, product web sites, and lab VOAs.

So.. in easy-to-mix 1/8 ounce jigger increments, here it is.  Remember, these amounts go in one gallon of Rotella T or T6:

Fl.Oz.    ppm for Redline            ppm if adding ZDDPlus or Eastwood ZDDP Booster

0.125      1271                                1320
0.250      1290                                1389
0.375      1309                                1458
0.500      1329                                1526
0.625      1348                                1595
0.750      1367                                1663
0.875      1387                                1731
1.000      1406                                1799
1.125      1425                                1867
1.250      1444                                
1.375      1463                              
1.500      1483                          
1.625      1502                              
1.750      1521                              
1.875      1540                              
2.000      1559                                
2.125      1577                              
2.250      1596                              
2.375      1615                              
2.500      1634      
2.625      1653      
2.750      1671      
2.875      1690      
3.000      1709      
3.125      1727      
3.250      1746      
3.375      1764      
3.500      1783      
3.625      1801      
3.750      1820      
3.875      1838      
4.000      1856

UPDATED JANUARY 2016

Shell has recently stated that the ZDDP level in the Rotella T and Rotella T-6 is 1,200 ppm, and has been since 2008.  At 1,200 ppm of ZDDP in the Rotella, most likely the cam and rockers will be lubed adequately without any additional ZDDP.  If you want to add some ZDDP - 1 oz. of Redline in each gallon of oil will get you right up to the 1,400 ppm maximum that is recommended.

The folliwing mix table is adjusted to represent the current 1,200 ppm that Shell claims in in their oil.  

Fl.Oz.    ppm for Redline            ppm if adding ZDDPlus or Eastwood ZDDP Booster

0.000      1200                                1200
0.125      1271                                1320
0.250      1290                                1389
0.375      1309                                1458
0.500      1329                                1526
0.625      1348                                1595
0.750      1367                                1663
0.875      1387                                1731
1.000      1406                                1799
1.125      1425                                1867