General Oils - Data

Mineral Vs Synthetic (Some comparisons)

For purposes of comparison, we have taken a well-known synthetic engine oil, Amsoil 10W-40 synthetic, and contrasted its characteristics with those of several prominent 10W-40 conventional motor oils. Below is a condensed summary of the results of several closely-monitored field and laboratory tests:

                                     Amsoil Synthetic       Petroleum
                                     10W40 10W40

1. Effective lubrication range -60 to +400 F 0 to +300F

2. Viscosity increase after 9% 102 to 400%

  single-sequence (64 hour)
  Olds III-D Test

3. Wear (mg. weight loss, Falex test) 1.1mg 3 to 6 mg

4. Fluidity @ -40F flows freely solid

5. Volatility (evaporation @ 300F 1% 28%

  for 22 hrs)

6. Crankcase Temperature (Track Test) 240F 290F

7. Flash Point (D92 test) 470F 400F

8. Oil consumption (50,000 mile test) 42% less than -

                                         petroleum oils

9. Intake valve deposits (50,000 miles) 32.1 grams 75.5 grams