I have used Mobil 1 15/50 for the past 7 years in all my roller cammed 455 race engines making about 650 HP. Never had an oiling or bearing problem. I usually change the oil and FRAM HP2 filter every 30 - 35 passes.
73 Firebird 455 D-Port, 3250 lbs.
Best ET: 9.93 @ 133 mph with a 1.318 60'
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1978 Pontiac Grand LeMans.......out next year
Previous - 2001 Jerry Haas-built P/S Grand Am - former WJ car, Hoffman Racing 535" IA2, Tiger Heads/Intake, Single Dominator, PG
Best ET: 7.776 @ 175.94, 1.096 60', 2375 lbs.
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