my other contribution is my OA study of a couple of different weights. i drop this in because i am unaware of any dino 0w-20 oils, and i know for a fact that all of the oils in this study were synthetic.
10w30
sample size 7
avg vis at 100 11.1
avg Fe/1000 miles 2.22
avg Pb/1000 miles 1.523
avg mileage 5158
5w30
sample size 8
avg vis at 100 9.63
avg Fe/1000 miles 3.57
avg Pb/1000 miles 0.342
avg mileage 7662
0w30
sample size 7
avg vis at 100 10.966
avg Fe/1000 miles 2.07
avg Pb/1000 miles 0.987
avg mileage 6077
0w40
sample size 6
avg vis at 100 11.98
avg Fe/1000 miles 1.83
avg Pb/1000 miles 0.29
avg mileage 5733
5w20
sample size 7
avg vis at 100 7.91
avg Fe/1000 miles 1.56
avg Pb/1000 miles 0.13
avg mileage 5400
0w20
sample size 7
avg vis at 100 8.58
avg Fe/1000 miles 1.257
avg Pb/1000 miles 0.62
avg mileage 10884
you will note that the 5w20 has the lowest Pb/1000 mile, and the 0w20 has the lowest Fe. the 0w20 numbers are skewed because most of the OAs were on Priuses, and the start stop cycle at each stop light will give you higher Pb. the inference i draw from this is that the lighter oils get pressure up quicker, establishing the hydrodynamic wedge sooner.
10w30
sample size 7
avg vis at 100 11.1
avg Fe/1000 miles 2.22
avg Pb/1000 miles 1.523
avg mileage 5158
5w30
sample size 8
avg vis at 100 9.63
avg Fe/1000 miles 3.57
avg Pb/1000 miles 0.342
avg mileage 7662
0w30
sample size 7
avg vis at 100 10.966
avg Fe/1000 miles 2.07
avg Pb/1000 miles 0.987
avg mileage 6077
0w40
sample size 6
avg vis at 100 11.98
avg Fe/1000 miles 1.83
avg Pb/1000 miles 0.29
avg mileage 5733
5w20
sample size 7
avg vis at 100 7.91
avg Fe/1000 miles 1.56
avg Pb/1000 miles 0.13
avg mileage 5400
0w20
sample size 7
avg vis at 100 8.58
avg Fe/1000 miles 1.257
avg Pb/1000 miles 0.62
avg mileage 10884
you will note that the 5w20 has the lowest Pb/1000 mile, and the 0w20 has the lowest Fe. the 0w20 numbers are skewed because most of the OAs were on Priuses, and the start stop cycle at each stop light will give you higher Pb. the inference i draw from this is that the lighter oils get pressure up quicker, establishing the hydrodynamic wedge sooner.