Please see our comparison of other grades of synthetic and non synthetic oils below
Oil Definition page | 0W20 | 5W30 | 10W30
Note: Score corresponds to the number of columns “won” by a particular oil. The more columns won the higher the score. So if 2 columns are won, than the score will be 2, if 1 column is won the score will be 1, so on and so forth. Winners are based on the highest amount of columns won thereby in my mind showing the best value.
To find out the meaning and importance of each category, please visit our Oil Definition Page
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| 10W30 Synthetic Oils | ||||||
| Oil Type | Viscosity Index | Flash Point | Fire Point | Pour Point | Four Ball Wear Test | Score |
| Amsoil OE synthetic Oil(Cheapest Grade) | 145 | 232*C 450*F |
250*C 482*F |
-40*C -40*F |
0.45 | 0 |
| Amsoil Signature Series synthetic oil (Top Grade) | 158 | 232*C 450*F |
248*C 478*F |
-48*C -54*F |
0.35 | 3 |
| Amsoil Z-rod | 154 | 240*C 464*F |
254*C 489*F |
-45*C -49*F |
0.36 | 1 |
| Amsoil XL synthetic oil | 145 | 232*C 450*F |
250*C 482*F |
-40*C -40*F |
0.44 | 0 |
| Amsoil Dominator (race only) Non SAE | 153 | 240*C 464*F |
256*C 492*F |
-45*C -49*F |
0.38 | 2 |
| Castrol Edge | 151 | 200*C 394*F |
N/A | -36*C -33*F |
N/A | 0 |
| Mobil-1 synthetic oil | 147 | 224*C 435*F |
N/A | -45*C -49*F |
N/A | 0 |
| Penzoil synthetic oil | 150 | 224*C 435*F |
N/A | -48*C -54*F |
N/A | 1 |
| Redline | 155 | N/A | N/A | -45*C -49*F |
N/A | 0 |
| Rotella T5 | 147 | 225*C 437*F |
N/A | -42*C -43*F |
N/A | 0 |
| Royal Purple synthetic oil | 155 | 218*C 425*F |
248*C 480*F |
N/A | N/A | 0 |
| Valvoline ILSAC grade | 153 | 223*C 433*F |
N/A | -39*C -38*F |
N/A | 0 |
| Valvoline Durablend (Semi Synthetic) | 141 | 216*C 420*F |
N/A | -33*C -27*F |
N/A | 0 |
| Non Synthetic 10W30 Oils | ||||||
| Castrol GTX | 142 | 204*C 400*F |
221*C 430*F |
-36*C -33*F |
N/A | 2 |
| Mobil 1000 | 141 | 222*C 431*F |
N/A | -33*C -27*F |
N/A | 1 |
| Mobil 2000 | 145 | 220*C 428*F |
N/A | -33*C -27*F |
N/A | 1 |
| Pennzoil Conventional | 135 | 221*C 429*F |
N/A | -30*C -22*F |
N/A | 0 |
| Quaker State | 136 | 210*C 426*F |
N/A | -30*C -22*F |
N/A | 0 |
Synthetic Winners:
Amsoil Signature Series oil
Non Synthetic Winners:
Castrol GTX
* Note, I feel like Castrol won this category because they seem to be the only guys producing a fire point spec- I think Mobil 1000 and 2000 have a pretty comparable product here.
*** Please note that there may be errors in the data from time to time, should you notice some incorrect information, or would like to see an oil compared that isn’t listed above, please tell us by visiting our contact us page and sending us message.
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Oil Definition page | 0W20 | 5W30 | 10W30
VI polymers provide zero lubrication so the less the better if you want then best lubrication.
That’s why straight weight oils have always been the gold standard in racing and high shear applications
The Penzoil conventional has the least which means it has more actual oil.
For this reason it’s always better to use 10w-30 if the climate allows.