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Royal Purple Motor Oil is a specially formulated multi viscocity
oil for use in gasoline and diesel engines of all types from cars
and trucks to SUVs, motorcycles and boats. Royal Purple Motor Oil
with Synerlec additive technology reduces friction, which results
in a 1-3 percent increase in horsepower, lowers operating
temperatures, provides superior corrosion protection, improves fuel
economy, reduces emissions and extends oil life. A.P.I.