Quote:
Originally Posted by A B Able Truck
The corrugated hose traps oil - stand on end with paper towel and let sit for a while - the towel will become an oil rag and this is only the oil left with no vacuum.
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This is a very sensible observation. If we can change the corrugated hoses with smooth hoses that won't collapse if vacuum is induced, the oil will not stay trapped in there. Maybe in very cold environment, the hoses don't warm enough, and there is more and more oil trapped in there (getting thick with cold), until it discharges at once?
You made the observation that the transparent hoses do collapse slightly. Maybe some PVC hoses attached to the OEM nipples?