I did a change a few days ago and used all my odd bottles of oil laying around. They had been hanging around for a while. One bottle was dated 2006, two from 2008 and 2 litres left from the last change - although this bottle was dated 2009.
The question is at the bottom of the 2006 & 2008 bottles there was a layer of white 'sludge'. I am guessing this was the additive settled out of the oil? I added a little oil and with a bit of shaking it mixed in. Is this 'normal' for oils sitting this long (bottles where unopened), and should I be worried? Is shaking it back in enough or should I be changing it out ASAP.
The question is at the bottom of the 2006 & 2008 bottles there was a layer of white 'sludge'. I am guessing this was the additive settled out of the oil? I added a little oil and with a bit of shaking it mixed in. Is this 'normal' for oils sitting this long (bottles where unopened), and should I be worried? Is shaking it back in enough or should I be changing it out ASAP.