Originally Posted by
seau grateau
Phil Wood & Co.
We recommend that a light film of grease be applied to the taper. This is only a recommendation for Phil Wood bottom brackets, as our taper was designed with grease in mind.
Sounds weird to me because JIS and ISO tapers are the same, 2 degrees off the centerline. However, they use different length and section of the total taper. Maybe they mean they recommend it for their cranks, which I'm sure they want you pairing to their bottom brackets.