[naz]

ZED_not_zee,Oct 20 2007, 09:52 PM Wrote:I've already switched to synthetic for a while now,  I hear an old wives tail that stated going back to conventional is "bad" IO don't know how or why...  this a great topic.. could you fill me in?
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i haven't seen any tech that conclusively says why you can or can't switch back and forth between synthetic and conventionally.

i've heard that tale too and it usually goes something like 'your oil seal gets used to synthetic' and going back to conventional results in 'bad things' usually oil leakage

i'm not an oil expert by any means but i can't imagine any reason why oil seals would care one way or another what type of lubricant is flowing past them, and i haven't experienced any of the 'bad things' that are supposed to happen from switching between the two

the only thing i experienced due to switching was much higher than normal oil consumption when i used mobil 1 synthetic 10w30 oil however i found out thru later research that particular type of mobil 1 shears down to a 20 weight quickly in the WRX engine and that is the reason for the consumption