10 Best Oil For Flat Tappet Cam Engine of August 2025

• Affordable Solutions
• Not designed for passenger car use
• Exclusive blend of extreme pressure additives
• Excellent for flat tappet camshafts or as an additive

Lucas Oil

• For best performance, follow the manufacturer's recommendations in your vehicle owner’s manual.
• Viscosity typical of 15W-50
• ZDDP anti-wear additives
• Military spec storage protection
• Start-up protection additives
• Excellent seal compatibility

Lunati

• Case of 5 // 1 Quart (32 Ounces)
• Formulated to provide the critical wear protection needed by the engine valve train and camshaft while allowing new piston rings to quickly seat to the engine cylinder walls.
• Combines highly refined mineral oil (for engine break-in) with an advanced additive package containing elevated levels of zinc/phosphorus anti-wear additive to optimize wear protection during sensitive engine break-in phase.
• For freshly built performace engines, particularly those using flat tappet camshafts and lifters.
• Fully formulated conventional 10W-30 engine oil that does NOT require the use of any other chemical additives.

Royal Purple

• Improves surface mating of rotating assembly, rod journals, piston rings, valve guides, cam and lifters, etc.
• Protects all internal engine components, including flat tappet and roller valve trains
• Proprietary additive package includes optimum amounts of ZDDP (Zinc and Phosphorus), Molybdenum and detergents
• Requires no additives or supplements for maximum protection
• Fully compatible with gasoline, methanol and high octane race fuel

Comp Cams

• Case of 12 // 1 Quart (32 Ounces)
• Formulated to provide the critical wear protection needed by the engine valve train and camshaft while allowing new piston rings to quickly seat to the engine cylinder walls.
• Combines highly refined mineral oil (for engine break-in) with an advanced additive package containing elevated levels of zinc/phosphorus anti-wear additive to optimize wear protection during sensitive engine break-in phase.
• For freshly built performace engines, particularly those using flat tappet camshafts and lifters.
• Fully formulated conventional 10W-30 engine oil that does NOT require the use of any other chemical additives.

Royal Purple

• Case of 7 // 1 Quart (32 Ounces)
• Formulated to provide the critical wear protection needed by the engine valve train and camshaft while allowing new piston rings to quickly seat to the engine cylinder walls.
• Combines highly refined mineral oil (for engine break-in) with an advanced additive package containing elevated levels of zinc/phosphorus anti-wear additive to optimize wear protection during sensitive engine break-in phase.
• For freshly built performace engines, particularly those using flat tappet camshafts and lifters.
• Fully formulated conventional 10W-30 engine oil that does NOT require the use of any other chemical additives.

Royal Purple

• Oils, Lubricants, cleaners, sealants, & miscellaneous fluids this product is of good quality
• Easy and flexible to use
• Manufactured in United States
• Improves surface mating of rotating assembly, rod journals, piston rings, valve guides, cam and lifters, etc.
• Protects all internal engine components, including flat tappet and roller valve trains
• Proprietary additive package includes optimum amounts of ZDDP (Zinc and Phosphorus), Molybdenum and detergents
• Requires no additives or supplements for maximum protection
• Fully compatible with gasoline, methanol and high octane race fuel

Comp Cams

• Prevents camshaft wear
• Reduces piston scuffing
• Increases engine life
• Makes newer oils work in older engines

Hy-per Lube by Rislone

• Lowers oil temperature
• Minimizes metal fatigue
• Improves pressure in worn engines
• Contains the high levels of zinc necessary to protect flat tappet cams, lifters and pushrods

Lucas Oil

• Quicker more efficient ring seal
• Higher levels of zinc and phosphorus maximum protection
• A must use for flat tappet camshaft break-in
• Less blow-by equates more power and better ring seal
• Requires no moly supplement and no additional additives

Lucas Oil