Having seen hydraulic systems contaminated to unacceptable ISO cleanliness ratings from an oil change from new unopened drums, ages ago I arranged for a rig with 5um filters. Hydraulics get charged with filtered oil on a fresh start...and it works. Clean from day 1, not after a month of filter changes.
Given that a used filter typically will be filtering better than a new filter...it's already caught some material, and that captured material helps filter smaller material.
And that having opened the system, you've exposed it to additional contamination, and possibly moisture (me in particular, I don't even have a shade tree to mechanic under at present).
Had me thinking as to whether it would be wisest to replace the filter at the OCI, having a new filter at it's lowest level of efficiency being exposed to potentially the dirtiest period of an OCI.
Maybe changing the filter next week was a better idea.
Change the filter next week advantages
* assuming it's not torn (but it could be new anyway), it will likely be filtering better than at any point in it's life;
* any new contaminants that are brought in, either by the oil or the open system will be taken away with the filter after having a week to get collected.
* as long as the ADBV was still functional, there should be a reduced period of no oil pressure on restart...my short OCIs on the L67 with same filter seem to have this borne out
Additional, possibly miniscule benefits, but BITOGERs are obsessed with argumentum ad absurdum
http://papers.sae.org/2007-01-4133/
The products of used oil appear to provide friction and wear reduction benefits over new oils...recently discussed...Maybe a pint or thereabouts of used oil, (an appendix worth maybe ??) can provide enough partially reacted additives to reduce the apparent wear early in the OCI.
When you change the filter...next weekend, it probably doesn't have to be warm/hot, the contents are the same as they were when the engine was shut down...manouevering hot drippy filters around chassis/suspension/tranny cooler lines is the worst part of any OCI for me...red hot oil changes are fine if it's sump plug and pan, warm to hot is my limit for filters.
When you restart, the pump is pretty close to still primed (you were quick with the filter change, it wasn't burny).
The oil running through the new filter is now arguably the cleanest it's likely to be for that OCI...which is handy if your new filter has torn media...if your old media WAS torn, you are in better shape post last OCI anyway.
Just a thought, for thoughts and giggles...I'm nearly sold on the idea.
(and if I decide to run a solid lube in the engine, there;'s a possibility that it's only in there for 1 week in 52 if it doesn't want to stay in suspension)
Given that a used filter typically will be filtering better than a new filter...it's already caught some material, and that captured material helps filter smaller material.
And that having opened the system, you've exposed it to additional contamination, and possibly moisture (me in particular, I don't even have a shade tree to mechanic under at present).
Had me thinking as to whether it would be wisest to replace the filter at the OCI, having a new filter at it's lowest level of efficiency being exposed to potentially the dirtiest period of an OCI.
Maybe changing the filter next week was a better idea.
Change the filter next week advantages
* assuming it's not torn (but it could be new anyway), it will likely be filtering better than at any point in it's life;
* any new contaminants that are brought in, either by the oil or the open system will be taken away with the filter after having a week to get collected.
* as long as the ADBV was still functional, there should be a reduced period of no oil pressure on restart...my short OCIs on the L67 with same filter seem to have this borne out
Additional, possibly miniscule benefits, but BITOGERs are obsessed with argumentum ad absurdum
http://papers.sae.org/2007-01-4133/
The products of used oil appear to provide friction and wear reduction benefits over new oils...recently discussed...Maybe a pint or thereabouts of used oil, (an appendix worth maybe ??) can provide enough partially reacted additives to reduce the apparent wear early in the OCI.
When you change the filter...next weekend, it probably doesn't have to be warm/hot, the contents are the same as they were when the engine was shut down...manouevering hot drippy filters around chassis/suspension/tranny cooler lines is the worst part of any OCI for me...red hot oil changes are fine if it's sump plug and pan, warm to hot is my limit for filters.
When you restart, the pump is pretty close to still primed (you were quick with the filter change, it wasn't burny).
The oil running through the new filter is now arguably the cleanest it's likely to be for that OCI...which is handy if your new filter has torn media...if your old media WAS torn, you are in better shape post last OCI anyway.
Just a thought, for thoughts and giggles...I'm nearly sold on the idea.
(and if I decide to run a solid lube in the engine, there;'s a possibility that it's only in there for 1 week in 52 if it doesn't want to stay in suspension)