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If new roller lifters are part of your engine upgrade, it’s a good idea to soak them in a high-zinc oil before installing them in the engine. We used Rislone high-zinc additive, but something like Comp Cams’ Break-In oil is an excellent choice. The high zinc content helps the roller bearings during the initial lifter break-in period. Yes, even roller lifters experience a break-in period. We found this Country Crock margarine tub will easily hold 16 lifters and a quart of oil and can be sealed with the lid for overnight soaking.