When to Choose a Synthetic
When designing a lubrication program, I use a very simple set of rules to know when to choose a synthetic for an application. They are as follows:
•when equipment-performance demands exceed the capabilities of mineral-based fluid,
•when synthetic properties can become problem-solvers,
•when life-cycle cost savings can be realized, or
•when safety and environmental issues can be enhanced
A 532 BBF is not a cheap engine to build, I know I have a new one waiting to be installed.With the appropriate management strategy, a change to a high-performance product can actually cost considerably less than the equivalent mineral oil product type. Outside of these considerations, somewhere around 165 degrees F represents the point at which you probably should begin to consider the use of synthetics for the sake of lubricant longevity, if not for the sake of reliability.
Even with a standard volume pump, pressure would be unecessarily high, but it would not "eat up the bearings in short order," in fact it would not eat up the bearings, period.using 20w50 in that tight an engine will eat up the crank and bearings in short order.
Given the engine application, the engine displacement, the roller cam, the HV pump, the overall build and its presumed power output, I would suggest you install engine bearings which give you an additional thousandth of clearance, thereby bringing your clearances closer to:
From a few fresh engines that I tore down shortly after assembly I found that 20W50 and .0015 .002 main and rod clearence there was more wear from cold starts than if the engines had .0025/.003 clearences.Even with a standard volume pump, pressure would be unecessarily high, but it would not "eat up the bearings in short order," in fact it would not eat up the bearings, period.