Simply the finest reciprocating aviation engine oil money can buy! Provides unequalled wear protection for your engine and does not require the supplemental additive to be put in seperately. Since personal aircraft may sit for periods, rust/corrosion is a major problem. Elite prevents rust like no other engine oil! We have helicopter fleets using Elite in severe applications and they are amazed with Elite's performance compared with other oils they have used. Elite is just as its name implies: the pinnacle of lubricant performance for your engine.