1950StangJump$
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Okay, I'm not getting much help, so figured I'd try here and see what the gurus think.
With Brenspeed's B326 long block, they dictate 10w40 CONVENTIONAL oil. The reason for the 10w40 is easy - if you don't lock the cams (they recommend keeping the VCT and using limiters), the increased oil pressure is necessary to overcome the motor's high lift valve springs.
But, why non-synthetic (after break in)? When I asked Brenspeed, they blew me off several times with canned answers that didn't give a mechanical/engineering reason. Finally, they old me the conventional was necessary because of the motor's bearing clearances. But, even that falls short a little for me. Is viscosity not viscosity, ie wouldn't 10w40 synthetic not have the same effect with said bearing clearance?
Brenspeed has no motive to push the conventional, so there must be some reason - they just haven't been liberal with the details on why. I just can't figure it out .... and after my break in is complete, I want to ensure I'm using the best oil possible.
With Brenspeed's B326 long block, they dictate 10w40 CONVENTIONAL oil. The reason for the 10w40 is easy - if you don't lock the cams (they recommend keeping the VCT and using limiters), the increased oil pressure is necessary to overcome the motor's high lift valve springs.
But, why non-synthetic (after break in)? When I asked Brenspeed, they blew me off several times with canned answers that didn't give a mechanical/engineering reason. Finally, they old me the conventional was necessary because of the motor's bearing clearances. But, even that falls short a little for me. Is viscosity not viscosity, ie wouldn't 10w40 synthetic not have the same effect with said bearing clearance?
Brenspeed has no motive to push the conventional, so there must be some reason - they just haven't been liberal with the details on why. I just can't figure it out .... and after my break in is complete, I want to ensure I'm using the best oil possible.