They talk about having a higher bypass pressure because of the high volume oil pump etc.
OE oil is 10w30, any issue with the XXw40 oils which many have said is a superior oil to the 10w30? Theoretically it should produce a higher hot pressure than w30.
When oil is hot there is no difference in fluid pressure of
ANY off the shelf oil weights. All hot motor oils flow
(statistically speaking) at the same rate. The difference
regarding the filter is during start-up when the oil is cold.
I run M1-15w50 on all my V10s because (spiritually) the zinc
content and smoother flow out weighs the potential bearing
cavitation and catalytic damage. Others feel differently. The
SRT Engineers even say the motor was designed for 10w40,
but the 10w30 was chosen to cover the warranty liabilities
of those Vipers being driven in Alaska and Antarctica.
If you drive in basic weather, the motor/filter is not going to
notice the difference once the engine has come up to temp.