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    Subaru STi race engine, RP XPR 5W/30, 3hrs

    Subaru 2.5L (EJ25) Dual AVCS, 4-cyl Turbo, race motor, track use, 7,500 RPM, 430 WHP, BW EFR turbo. OIL TYPE & GRADE: Royal Purple XPR 5W/30 HR on Oil: 3 Hours Total HR on engine: 6 hours I am using 32 ounces of TORCO per 5 gallons of premium 93 octane, the maximum amount of Torco octane booster...
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