RE: synthetic motor oil
850's use semi-synthetic oil anyway, so going straight to full synthetic shouldn't be a problem (it wasn't on my T5 anyway... and that had done a shade over 200k (miles) when I got it (ex-plod)
On other cars that are using mineral oil currently it is advisable to run on semi-synthetic for one oil change, as going straight for full synthetic results in oil seperating and emulsions forming (not too good for lubrication anyway)
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