Stick with the Mobil 1. Royal Purple is good stuff...but not worth paying the extra $$$ over Mobil 1. The only thing I'd buy over Mobil 1 is Amsoil...but at around $6/qt, it's a bit rich for my blood. Mobil 1 is the best stuff you can find regularly at the parts store anyhow.
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1984 1/2 GT350 (#842 Hatchback w/ T-tops), 302HO, Comp cams Xtreme Energy cam, Carter 625cfm carb, Weiand Stealth intake, MSD distributor, MSD coil, FMS 9mm wires, 1 5/8" MAC unequal shorties, 2 1/2" MAC Prochamber H-pipe, Flowmaster 2 chambers, KYBs, 16"x8" 4 lug Cobra Rs, Falken 245/45ZR16s
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