TRIM Cutting & Grinding Fluids OCA/1 Extreme Pressure Oil Additive, Clear Antiweld, 1 gal Jug For additions to straight cutting oils in screw machine operations, a starting rate of 5% is recommended For very heavy-duty tasks, such as threading hard stainless or alloy steels, try starting at up to 15% An effective booster additive for recycling straight cutting oil at an add rate of 1%-3% There is no maximum rate; OCA can be used neat for tasks such as high-speed tapping