Australia.
http://www.mobil1.com.au/why/wearprotection.aspx
http://www.mobil1.com.au/why/outstanding.aspx
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Mobil 1 Offers Superior Wear Protection
At start-up, mineral oils takes longer to circulate in an engine. This induces friction between dry parts of the engine, eventually reducing the life of the engine. In contrast, a synthetic engine oil starts circulating right away, protecting every moving part within the engine.
Oils meeting higher performance specification such as MB 229.5 offer improved wear protection. Reduced levels of wear ensure a healthier engine and longer engine life.
Certain engine oil specifications require a minimum passing wear requirement to be achieved. More demanding specifications set tougher limits (e.g. the Mercedes-Benz specification system uses tiered wear limits for certain engine tests).
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Outstanding Cleanliness And Deposit Control
Mobil 1 Provides Exceptional Cleaning Performance For Older Engines
In laboratory tests, we switched an American engine and European engine that had been running with conventional mineral oil to Mobil 1. Following 14,000 miles of driving with Mobil 1 at recommended oil drain intervals, the European vehicle returned to near showroom levels of cleanliness. The American vehicle experienced even greater improvement.
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Mobil 1 Offers Superior Resistance To Deposits Even At High Temperatures
Mobil 1 is more effective at resisting high temperature deposits than some other leading fully synthetic and semi-synthetic oils. Our test simulates high temperature piston deposit formulation which reduces engine efficiency. The test oil is heated to 285°C and directed onto a rapidly spinning (2500rpm) aluminum disc which is heated to 330°C. This test lasted 3 hours. At the end of the test, we assigned the oil a cleanliness rating out of 100.