Thought about it while reading some other comments.
I'll go along with the filter aswell, anti drain back valve, possibly causing issues.
Prob recommend as said a fram or k&n filter, bit stronger construction, anti drain back valves, filter paper in them is strong doesnt break down if you get a spike in pressure.
This problem has been around for decades. I have half a dozen 308s that sit for long periods of time. With a couple of them, I know I can leave them for a year and they will be fine. With others, after three or four months the oil has drained out and the pump needs to be primed. The L34 suffers from it even though it carries an extra litre or two in the oil cooler which is mounted higher than the pump. This is because the anti drainback valve in the filter prevents this oil from returning to the pump. (Its job)
While your car is sitting, the pump slowly empties itself into the sump and the filter remains full. But you have a pump with no prime and a full oil filter isn't going to do a thing as it is on the pressure side.
This video shows a forum members (koalasprint) solution to priming the pump. He made the adaptor from an old filter.
Changing the subject a little bit, a killer pump with heaps of flow and pressure, or for that matter the Moroso accumulator that Andrew posted won't fix all the 308's oil problems if you are revving it hard on the circuit. The problem there is that the oil can't get back to the sump quick enough and you end up filling the rocker covers. Plenty has been written about it in here. (And the AV8 forum Brett, but we won't go there!! )
Edited by Shiney005, 13 September 2018 - 10:36 AM.
Thanks again for all your thoughts & links, it is much appreciated & somewhat reassuring to know that I'm not the only one that has had this issue. Yes I have been doing a fair bit of reading dint posting the original post, on a few forums. Thanks to Koalasprint for making his priming video.
I did an oil change on my daily tonight (253VH) so now I am 1/2 way there with my priming adaptor (thanks to its old oil filter), quick hit with the mig tomorrow, so if the weekend allows all systems go for priming.
I have cut the Repco Filter (off the VH) apart & will keep its guts to compare with the AC Delco on the Hatch & then the Ryco that just went on the VH (when it's changed next). They didn't have any Fram's or K&N's in stock..... maybe next time. I was surprised how much more the Ryco weighed than the Repco when I was at the store. The inner cage looked heavier in construction.....
Will be interested to see if the anti-drain back valve has worked on the AC Delco on the problematic hatch, when I take it off to prime the pump.......
Edited by UC308Hatch, 13 September 2018 - 08:30 PM.
It's a front mount 5 hole adjustable 25mm LX torry 'Signature Swaybar" from Todd Selby adapted to suit UC since no one does one to suit UC. I run a 18mm 3 hole adjustable 'Detroit 9" ' UC style of the same brand on the rear.
At the moment I have both set on the middle setting, where I initially set them. Have been playing with other stuff, want to try increasing the front stiffness a little & see how that goes, but pretty how with how it's handling now.
An old trick to this problem was to jack the back of the vehicle up and leave it overnight and starting it the next morning. All oil drains back to the right areas and you have oil pressure on start up☺️