AMSOIL The First in Synthetics
AMSOIL outperforms all others Oils!
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 percent evaporation loss is allowable to meet the API SL and ILSAC GF-3 specifications.
AMSOIL 5W-30 Synthetic Motor
Oil lost an extremely low 4.9 percent 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 percent of its original weight. 
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. 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. 
FlashFire 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. AMSOIL 5W-30 Synthetic Motor Oil has higher flash and fire points than does Mobil 1 SuperSynOil. 
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. AMSOIL 5W-30 Synthetic Motor Oil has a lower pour point than Mobil 1 SuperSyn 5W-30 Motor Oil. 
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. AMSOIL 5W-30 Synthetic Motor Oil has a higher TBN than Mobil 1 SuperSyn 5W-30 Motor Oil.
