@ VDT
I rarely post but do not understand your comment at all, working in an industry that uses oil filled machines that must have there oil analysed every year or so and in previous roles being in charge of having machines emptied and refilled. Vacuuming out oil is standard practice. In fact in Germany and Czech I have seen on many an occasion a car oil drain completed in this way. The oil in the sump is completely removed baring wall residue. Why do you say that those in the know would no do it this way?
What I still find amazing is the amount of people who don't, won't or do not realise that a %'age is always left in the oil cooler. Or that filtration is an interlinked factor with lubrication but does not have a linear link. Once oil contains X% of held contamination it is no good but inversely I have had to dump over 1000L of oil as it had been over heated and lost IRO 8% effective lubrication this held no particle contamination of concern so a filter swap was not required. So why in this age do we swap the filter when we swap the oil as the cost of raw materials must be getting close to the labour cost ( even more so if DIY)
I rarely post but do not understand your comment at all, working in an industry that uses oil filled machines that must have there oil analysed every year or so and in previous roles being in charge of having machines emptied and refilled. Vacuuming out oil is standard practice. In fact in Germany and Czech I have seen on many an occasion a car oil drain completed in this way. The oil in the sump is completely removed baring wall residue. Why do you say that those in the know would no do it this way?
What I still find amazing is the amount of people who don't, won't or do not realise that a %'age is always left in the oil cooler. Or that filtration is an interlinked factor with lubrication but does not have a linear link. Once oil contains X% of held contamination it is no good but inversely I have had to dump over 1000L of oil as it had been over heated and lost IRO 8% effective lubrication this held no particle contamination of concern so a filter swap was not required. So why in this age do we swap the filter when we swap the oil as the cost of raw materials must be getting close to the labour cost ( even more so if DIY)
to which i replied...really?... that's funny as i have only just changed them. No response came back from the advisor as he or audi had been caught out red handed.You could say he looked
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