I copied this from another site, seems VR1 is best
As you will see below, zinc levels, viscosity, and synthetic or conventional oil, are not what determines an oils wear protection capability. The base oil and its additive package as a whole is what determines an oils wear protection capability. Here is the load carrying capacity/film strength ranking list from all the testing Ive performed so far (the higher the psi, the better the protection).
Oil categories for gasoline engines:
Over 90,000 psi = OUTSTANDING protection
75,000 to 90,000 psi = GOOD protection
60,000 to 75,000 psi = MODEST protection
Below 60,000 psi = UNDESIRABLE protection
1. 5W30 Pennzoil Ultra, API SM synthetic = 115,612 psi
I have not been able to find this oil with the latest API SN certification. The bottle says, No leading synthetic oil provides better wear protection. For once, a products hype turns out to be true.
zinc = 806 ppm
phos = 812 ppm
moly = 66 ppm
2. "USED" 5W30 Chevron Supreme, API SN conventional with 5,000 miles on it = 112,992 psi
zinc = TBD
phos = TBD
moly = TBD
total anti-wear = TBD
The wear protection capability psi value shown here is 13% "higher" than the wear protection capability psi value for this oil when it was brand new oil. Repeated testing of this used oil showed consistent values within a few percent of this posted value. Those test results were averaged and came out to the final 112,992 psi value shown here. So, the number is correct. I've tested two USED oils so far, and both times the used oil final psi values have been noticeably and consistently higher that the new oil testing performed on those oils.
The new and used oils no doubt came from different batches of oil, because of the purchasing and testing time differences. But, the consistent improvement of the used oil's wear protection capability, does indicate a change in the oil as it ages. And the important thing is that testing proves that there is NO LOSS of wear protection in used oil, even though the anti-wear component levels drop SIGNIFICANTLY due to normal depletion over time. Higher levels of anti-wear components only provides "longer" wear protection, NOT "more" wear protection. As long as those anti-wear components are not completely exhausted, you are still good to go.
These results also show that the normal practice of "Wear Testing" brand new oil is representative of the oil's overall wear protection capability, since the used oils wear protection capability does not drop.
3. USED 5W20 Castrol Edge with Titanium, API SN synthetic with 5,000 miles on it = 107,391 psi
zinc = 791 ppm (down 251 ppm or down 24% from new)
phos =643 ppm (down 214 ppm or down 25% from new)
moly = 67 ppm (down 33 ppm or down 33% from new)
titanium = 36 ppm (down 13 ppm or down 27% from new)
total anti-wear = 1537 ppm (down 511 ppm or down 25% from new)
The wear protection capability psi value shown here is 7% "higher" than the wear protection capability psi value for this oil when it was brand new oil. Repeated testing of this used oil showed consistent values within a few percent of this posted value. Those test results were averaged and came out to the final 107,391 psi value shown here. So, the number is correct. I've tested two USED oils so far, and both times the used oil final psi values have been noticeably and consistently higher that the new oil testing performed on those oils.
The new and used oils no doubt came from different batches of oil, because of the purchasing and testing time differences. But, the consistent improvement of the used oil's wear protection capability, does indicate a change in the oil as it ages. And the important thing is that testing proves that there is NO LOSS of wear protection in used oil, even though the anti-wear component levels drop SIGNIFICANTLY due to normal depletion over time. Higher levels of anti-wear components only provides "longer" wear protection, NOT "more" wear protection. As long as those anti-wear components are not completely exhausted, you are still good to go.
These results also show that the normal practice of "Wear Testing" brand new oil is representative of the oil's overall wear protection capability, since the used oils wear protection capability does not drop.
4. 10W30 Lucas Racing Only synthetic = 106,505 psi
zinc = 2642 ppm
phos = 3489 ppm
moly = 1764 ppm
NOTE: This oil is suitable for short term racing use only, and is not suitable for street use.
5. 5W30 Mobil 1, API SN synthetic = 105,875 psi
zinc = 801 ppm
phos = 842 ppm
moly = 112 ppm
6. 0W30 Amsoil Signature Series 25,000 miles, API SN synthetic = 105,008 psi
zinc = 824 ppm
phos = 960 ppm
moly = 161 ppm
7. 10W30 Valvoline NSL (Not Street Legal) Conventional Racing Oil = 103,846 psi
zinc = 1669 ppm
phos = 1518 ppm
moly = 784 ppm
NOTE: This oil is suitable for short term racing use only, and is not suitable for street use.
8. 5W50 Motorcraft, API SN synthetic = 103,517 psi
zinc = 606 ppm
phos = 742 ppm
moly = 28 ppm
9. 10W30 Valvoline VR1 Conventional Racing Oil (silver bottle) = 103,505 psi
zinc = 1472 ppm
phos = 1544 ppm
moly = 3 ppm
10. 10W30 Valvoline VR1 Synthetic Racing Oil, API SL (black bottle) = 101,139 psi
zinc = 1180 ppm
phos = 1112 ppm
moly = 162 ppm
11. 5W30 Chevron Supreme, API SN conventional = 100,011 psi
This one only costs $4.29 per quart at the Auto Parts Store where I bought it.
zinc = 1018 ppm
phos = 728 ppm
moly = 161 ppm
12. 5W20 Castrol Edge with Titanium, API SN synthetic = 99,983 psi
zinc = 1042 ppm
phos = 857 ppm
moly = 100 ppm
titanium = 49 ppm
13. 20W50 Castrol GTX ,API SN conventional = 96,514 psi
zinc = 610 ppm
phos = 754 ppm
moly = 94 ppm
14. 30 wt Red Line Race Oil synthetic = 96,470 psi
zinc = 2207 ppm
phos = 2052 ppm
moly = 1235 ppm
NOTE: This oil is suitable for short term racing use only, and is not suitable for street use.
15. 0W20 Mobil 1 Advanced Fuel Economy, API SN synthetic = 96,364 psi
zinc = 742 ppm
phos = 677 ppm
moly = 81 ppm
16. 5W30 Quaker State Ultimate Durability, API SN synthetic = 95,920 psi
zinc = 877 ppm
phos = 921 ppm
moly = 72 ppm
17. 5W30 Castrol Edge with Titanium, API SN synthetic = 95,717 psi
zinc = 818 ppm
phos = 883 ppm
moly = 90 ppm
titanium = 44 ppm
18. 10W30 Joe Gibbs XP3 NASCAR Racing Oil synthetic = 95,543 psi
zinc = 743 ppm
phos = 802 ppm
moly = 1125 ppm
NOTE: This oil is suitable for short term racing use only, and is not suitable for street use.
19. 5W20 Castrol GTX, API SN conventional = 95,543 psi
zinc = TBD
phos = TBD
moly = TBD
NOTE: Oil numbers 17 and 18 were tested weeks apart, but due to the similarities in their wear scar sizes, their averages ended up the same.
20. 5W30 Castrol GTX ,API SN conventional = 95,392 psi
zinc = 830 ppm
phos = 791 ppm
moly = 1 ppm
21. 10W30 Amsoil Z-Rod Oil synthetic = 95,360 psi
zinc = 1431 ppm
phos = 1441 ppm
moly = 52 ppm
22. 5W30 Valvoline SynPower, API SN synthetic = 94,942 psi
zinc = 969 ppm
phos = 761 ppm
moly = 0 ppm
23. 5W30 Valvoline Premium Conventional, API SN = 94,744 psi
zinc = TBD
phos = TBD
moly = TBD
24. 5W20 Mobil 1, API SN synthetic = 94,663 psi
zinc = 764 ppm
phos = 698 ppm
moly = 76 ppm
25. 5W20 Valvoline SynPower, API SN synthetic = 94,460 psi
zinc = 1045 ppm
phos = 742 ppm
moly = 0 ppm
26. 5W30 Lucas, API SN conventional = 92,073 psi
zinc = 992 ppm
phos = 760 ppm
moly = 0 ppm
27. 5W30 O'Reilly (house brand), API SN conventional = 91,433 psi
This one only costs $3.99 per quart at the Auto Parts Store where I bought it.
zinc = 863 ppm
phos = 816 ppm
moly = 0 ppm
28. 5W30 Maxima RS530 Synthetic Racing Oil = 91,162 psi
zinc = 2162 ppm
phos = 2294 ppm
moly = 181 ppm
29. 5W30 Red Line, API SN synthetic = 91,028 psi
zinc = TBD
phos = TBD
moly = TBD
30. 5W20 Royal Purple API SN synthetic = 90,434 psi
zinc = 964 ppm
phos = 892 ppm
moly = 0 ppm
31. 10W30 Quaker State Defy, API SL semi-synthetic = 90,226 psi
zinc = 1221 ppm
phos = 955 ppm
moly = 99 ppm
32. 10W60 Castrol TWS Motorsport, API SJ conventional = 90,163 psi
This oil is manufactured in Europe and is sold in the US for BMW models M3, M5, M6, Z4M, and Z8.
zinc = TBD
phos = TBD
moly = TBD
33. 5W20 Valvoline Premium Conventional, API SN = 90,144 psi
zinc = TBD
phos = TBD
moly = TBD
34. 30 wt Castrol Heavy Duty, API SM conventional = 88,089 psi
zinc = 907 ppm
phos = 829 ppm
moly = 56 ppm
35. 20W50 LAT Synthetic Racing Oil, API SM = 87,930 psi
zinc = TBD
phos = TBD
moly = TBD
36. 10W30 Joe Gibbs HR4 Hotrod Oil synthetic = 86,270 psi
zinc = 1247 ppm
phos = 1137 ppm
moly = 24 ppm
37. 5W20 Pennzoil Ultra, API SM synthetic = 86,034 psi
I have not been able to find this oil with the latest API SN certification.
zinc = TBD
phos = TBD
moly = TBD
38. 15W40 RED LINE Diesel Oil synthetic, API CJ-4/CI-4 PLUS/CI-4/CF/CH-4/CF-4/SM/SL/SH/EO-O = 85,663 psi
zinc = 1615 ppm
phos = 1551 ppm
moly = 173 ppm
39. 5W30 Royal Purple API SN synthetic = 84,009 psi
zinc = 942 ppm
phos = 817 ppm
moly = 0 ppm
40. 20W50 Royal Purple API SN synthetic = 83,487 psi
zinc = 588 ppm
phos = 697 ppm
moly = 0 ppm
41. 20W50 Kendall GT-1 High Performance with liquid titanium, API SN conventional = 83,365 psi
zinc = 991 ppm
phos = 1253 ppm
moly = 57 ppm
titanium = 84 ppm
42. 5W30 Mobil 1 Extended Performance 15,000 mile, API SN synthetic = 83,263 psi
zinc = 890 ppm
phos = 819 ppm
moly = 104 ppm
43. 0W20 Castrol Edge with Titanium, API SN synthetic = 82,867 psi
zinc = TBD
phos = TBD
moly = TBD
44. 5W30 LAT Synthetic Racing Oil, API SM = 81,800 psi
zinc = 1784 ppm
phos = 1539 ppm
moly = 598 ppm
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