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DE5EC751-ADC0-4745-9969-1FCEC2EC4AD26FD25CF1-D529-485A-887B-A23D766469B9Regardless what type of Cam, the Best oil for a Fontana based engine is PennGrade 1 20w50 Partial Synthetic Motor Oil. Contains High Levels of Zinc and Phosphorus. That’s what I use on my 427 Fontana Engine with hydraulic roller lifters. Best Oil in MHO. Running Eight Stacks EFI. 520 RWHP and 500 Lbs of Torque at the Wheels at 6200 RPM.

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