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99 323 Syntheic or regular oil? and Air filter Q's (archive)

[ Follow Ups ] [ 3-series (E46) Message Board ] [ Msg. Board FAQ ]

Posted by Steve on February 16, 1999 at 09:33:52:

Just ordered my 323i and was curious about regular vs. Synthetic oil, On an earlier post I was told Mobil one or the BMW syn. Does it hurt/help the engine to use synthetic? I was told it doesn't compress the seals as well are regular and causes leaks so you cannot switch to syn until the seals are firmly in place? What milage is it ok to switch to synthetic? Also what about replacing the stock airfilter with a preformance one? I'd like to get any extra power/preformance out of the engine as possible without getting into a ton of mods etc, just a few simple things any suggestions on filters or anything else? thanks Ohh one other question I've only seen the sports package with the M areo package, whats the difference in it doesn't have it?

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