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RECOMMEND MOTOR OILS
Brian Crower, Inc does not recommend using any synthetic motor oil lacking zinc (ZDDP). This is especially critical with flat tappet, bucket or scrubber type finger follower camshafts (2JZ, EJ Series, B Series, SR20, etc…). Roller followers are not as critical but it is still recommended to utilize the added zinc content to prevent any premature wear.

To protect a new flat tappet, bucket or scrubber type finger follower camshaft during camshaft break-in:

Use a dedicated break-in oil that’s specifically designed for flat-tappet camshaft break-in.
Use mineral-based engine oil (preferably a nondetergent oil in the 30W or 10W30 range), plus a 16- to 20-oz. bottle of specialty ZDDP additive.


To provide long-term protection for a flat tappet, bucket or scrubber type finger follower:
Use a specialty engine oil that contains high levels of ZDDP (around 1000 to 1200 ppm). Brands like JGR Driven, Shell Rotella and Chevron Delo and Brad Penn are excellent brands to source.
Use the engine oil of your choice, plus a bottle of ZDDP additive with every oil change.


Note: Engine oils specifically designed for use in diesel applications will usually feature more zinc than passenger car gas engine oils. However, diesel engines are coming under greater scrutiny as well, in an effort to further reduce nationwide emissions. So, while a dedicated diesel oil may be better than a passenger car gas engine oil in terms of zinc content, you can’t automatically assume that any diesel oil contains enough ZDDP to protect a new flat-tappet cam.

Literally says so in the literature to use an oil with higher levels of zddp