MSOIL INC SET OUT to examine the specifics of the overly broad "Nothing Outperforms..." Mobil
claim. AMSOIL 5W-30 Synthetic Motor Oil (ASL) and Mobil 1 SuperSyn 5W-30 Motor Oil were
analyzed in five key bench tests measuring motor oil performance: NOACK volatility,
flash/fire point, pour point, four-ball wear, and total base number (TBN). As shown
in the accompanying charts, AMSOIL outperformed Mobil 1 in all five areas.
The NOACK Volatility Test determines the evaporation loss of lubricants in high-temperature
service. The more motor oils vaporize, the thicker and heavier they become, contributing to poor
circulation, reduced fuel economy, increased oil consumption, and excessive wear and emissions.
A maximum of 15% evaporation loss is allowable to meet the API SL and ILSAC GF-3
specifications. As shown in the graph, AMSOIL 5W-30 Synthetic Motor Oil lost an extremely low 4.9%
of its original weight during high-temperature service, maintaining its superior
protective and performance qualities, while Mobil 1 SuperSyn 5W-30 Motor Oil lost
9.17% of its original weight.
Four Ball Wear
The Four Ball Wear Test determines the wear protection properties of a lubricant by
measuring the wear scars produced by four metal balls in sliding contact under the test parameters.
The smaller the average wear scar, the better the wear protection provided by the lubricant.
As shown in the graph, AMSOIL 5W-30 Synthetic Motor Oil completed the Four Ball Wear
Test producing a smaller wear scar than the Mobil 1 SuperSyn 5W-30 Motor Oil.
Flash / Fire Point
The Flash/Fire Point Test determines the lowest temperatures at which application
of a flame will cause lubricant vapors to ignite (flash point), and sustain burning
for five seconds (fire point). Lubricants with higher flash and fire points exhibit
more stable volatility characteristics and are safer to use and transport. As shown in the
graph, AMSOIL 5W-30 Synthetic Motor Oil has higher flash and fire points than Mobil 1
SuperSyn 5W-30 Motor Oil.
The Pour Point Test determines the lowest temperature at which a lubricant flows.
The lower a lubricant's pour point, the better protection it provides in low-temperature service.
As shown in the graph, AMSOIL 5W-30 Synthetic Motor Oil has a lower pour point than Mobil SuperSyn
5W-30 Motor Oil.
Total Base Number
Total Base Number (TBN) is the measurement of a lubricant's reserve alkalinity.
The higher a motor oil's TBN, the more effective it is in handling contaminants and
reducing the corrosive effects of acids for an extended period of time. As shown in the
graph, AMSOIL 5W-30 Synthetic Motor Oil has a higher TBN than Mobil 1 SuperSyn 5W-30