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Driven BR40 - Conventional Break-In Oil 10W-40
Type of Oil: Driven break-in mineral oil is a low-detergent, high-ZDDP formulation. The use of high zinc/phosphorus (ZDDP) is known for its anti-wear properties, which is crucial during the break-in period.
Purpose: The oil is designed to protect the engine, especially the valve train, during the critical running-in period. It aims to facilitate the best ring seal in the engine block, which is essential for achieving optimal compression figures.
Overall, this information provides a comprehensive guide for the use of driven break-in mineral oil during the critical break-in period of an engine, emphasizing the importance of proper running-in procedures and subsequent oil changes for optimal engine performance and longevity.
Recommended Grades: The oil is available in 5W-30, 10W-40, and 15W-50 grades, offering options for different applications and conditions.
Running-In Procedure: The recommended running-in procedure involves running the engine at 1,800-2,200 rpm for around 30 minutes on the dyno (or during initial road use). This is followed by cooling, and then full power pulls to build cylinder pressure and aid piston ring sealing.
Duration of Running-In: Effective running-in can be achieved within two hours on the dyno or 500 road miles. This suggests that proper break-in is essential for the longevity and performance of the engine.
Post-Running-In Oil Change: It is advised to change the oil after the initial running-in period, especially if the engine is installed in a car. Continuing to run at modest loads for around 500 miles before changing the oil is recommended.
Note on Smoke: The information notes that the engine may smoke through the valve cover breathers when using this oil. This is attributed to the light-end base oils designed to burn and assist in piston ring sealing.