Hey guys, sorry to open this again, but:
Is it possible that by adding a remote oil filter kit with the oil filter opening pointing down that you are starving the engine of needed oil. For example:
With the motor off the oil level in the sump is Ok. Once started, the oil pressure fills the remote oil filter, which takes from the motor the amount of oil required to fill the oil filter plus associated lines? In the normal position the oil filter would still contain a certain amount of oil when the motor is off.
Maybe the oil filter should be mounted with the opening up so that the filter is full even when the motor is Off?