QUOTE(-dexter- @ Jan 11 2008, 03:05 PM)
i thought each time u service they will drain all the old engine oil first then fill the new 1?...or they just add on only?
Of course drain bro, in my opinion flush or not doesn't really matter since fully syn oil can be mixed with mineral oil. Later on when you do your second oil change it would have cleared the old oil out. If you flush also there is going to be residue in the engine because there's no way it can remove all of the flushing fluid which is then worse because it will thin out the good ex fully syn oil. OR if you flush then run mineral oil again to clean out the flushing then is back to square one again, mineral oil mixed with fully syn. So wat's the logic there?
Jan 11 2008, 03:10 PM

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