Amsoil 10W-40 Synthetic vs Petroleum Oil Comparison Chart - Test Properties

This document is a comparison table contrasting the performance properties of Amsoil 10W-40 100% synthetic motor oil against conventional petroleum-based 10W-40 oil. Nine test criteria are presented. The synthetic oil shows an effective lubrication range of -60 F to +400 F versus 0 F to 300 F for petroleum. In the Olds III-D 64-hour single-sequence test, viscosity increase is 9% for Amsoil versus 102 to 400% for petroleum. Falex wear testing shows 1.1 mg weight loss for synthetic versus 3 to 6 mg for petroleum. At -40 F, the synthetic flows freely while petroleum is solid. Volatility (evaporation at 300 F for 22 hours) is 1% versus 28%. Track-test crankcase temperature is 240 F for Amsoil versus 290 F for petroleum, and D92 flash point is 470 F versus 400 F. In a 50,000-mile test, oil consumption with the synthetic was 42% less than with petroleum, and intake valve deposits at 50,000 miles measured 32.1 grams for Amsoil versus 75.5 grams for petroleum. The table appears to be Amsoil promotional/comparison literature; no vehicle year, make, model, or part numbers are stated in the document itself.