Just kicking some ideas around at the moment, and it would only work in a BITOGer's universe.
I'm contemplating the following. And aided by the fact that I'm becoming monogomous in my stash rather than a different oil every other change.
10,000km OCIs (already doing it)
20,000km filter changes (already doing it)
doing the filter change the weekend AFTER doing the oil change.
Reasoning being that DrDave has done particle counts, demonstrating pretty clearly that the effectiveness of the oil filter improves with time, a process called "blinding" in industrial filters (the flue gas fabric filters in power plants NEED a hundred hours at very low flow rates to cake up enough to filter the smoke particles)
http://www.bobistheoilguy.com/forums/ubbthreads.php/topics/4053638/Re:_2013_Sportster_1200_5000_m#Post4053638
Coupled with former member Stinky Peterson (RIP) having done VOAs of heaps of out of the bottle oils that showed horrid particle counts...again, common industrially, we filter hydraulic oils on the way into the oil tanks, as it's too hard to clean them up if we just tip new oil in.
So keeping the filter on for two OCIs means that
* the filter is more effective
* the new oil being added is cleaned by the most effective filter that it's ever going to see, rather than being "dirty oil" on a not as effective filter.
Changing the filter a week after the OCI gets that initial kick of particles out.
Yes, have seen the complaints of leaving used oil in the engine.
But wait, there's more...
http://www.bobistheoilguy.com/forums/ubb...r_W#Post4049815
There are heaps of papers that demonstrate that used oil forms tribofilms faster than new oil. The used oil has more reactive and partially reacted species from the breakdown of the ZDDP and MoDTC which are more surface reactive than the virgin, as yet untouched additives.
There's genuine reason to change oil to get all sorts of things out of the engine, but is there good reason to remove ALL of it ?
Not so sure personally.
So combining the two, I'm half contemplating on my 7 litre sumped Nissan, pulling 5 of the 7 litres every 8,000km (10k OCIs), and doing the filter every 20,000km.
Only time new oil will see new filter is at 80,000km intervals, and change that filter a week or so after the OCI anyway.
I'm contemplating the following. And aided by the fact that I'm becoming monogomous in my stash rather than a different oil every other change.
10,000km OCIs (already doing it)
20,000km filter changes (already doing it)
doing the filter change the weekend AFTER doing the oil change.
Reasoning being that DrDave has done particle counts, demonstrating pretty clearly that the effectiveness of the oil filter improves with time, a process called "blinding" in industrial filters (the flue gas fabric filters in power plants NEED a hundred hours at very low flow rates to cake up enough to filter the smoke particles)
http://www.bobistheoilguy.com/forums/ubbthreads.php/topics/4053638/Re:_2013_Sportster_1200_5000_m#Post4053638
Coupled with former member Stinky Peterson (RIP) having done VOAs of heaps of out of the bottle oils that showed horrid particle counts...again, common industrially, we filter hydraulic oils on the way into the oil tanks, as it's too hard to clean them up if we just tip new oil in.
So keeping the filter on for two OCIs means that
* the filter is more effective
* the new oil being added is cleaned by the most effective filter that it's ever going to see, rather than being "dirty oil" on a not as effective filter.
Changing the filter a week after the OCI gets that initial kick of particles out.
Yes, have seen the complaints of leaving used oil in the engine.
But wait, there's more...
http://www.bobistheoilguy.com/forums/ubb...r_W#Post4049815
There are heaps of papers that demonstrate that used oil forms tribofilms faster than new oil. The used oil has more reactive and partially reacted species from the breakdown of the ZDDP and MoDTC which are more surface reactive than the virgin, as yet untouched additives.
There's genuine reason to change oil to get all sorts of things out of the engine, but is there good reason to remove ALL of it ?
Not so sure personally.
So combining the two, I'm half contemplating on my 7 litre sumped Nissan, pulling 5 of the 7 litres every 8,000km (10k OCIs), and doing the filter every 20,000km.
Only time new oil will see new filter is at 80,000km intervals, and change that filter a week or so after the OCI anyway.