A while ago I did some comparison tests on the corrosion resisting ability of some popular 2 stroke oils. The winner, Castrol TTS, was quite unexpected. It is a high performance fully synthetic (PAO) type, and when designed, building in corrosion protection would have been well down on the list of 'priorities'. It's quite low viscosity at 'storage' temperatures so this wouldn't have helped to keep a thick protective film on the test brgs as long as with some of the other oils.
This result has puzzled me for some time. Does anyone have any good ideas as to why the TTS may have come out tops ?
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