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1997 523i e39 engine oil recommendation.

11K views 4 replies 5 participants last post by  oilmansi 
#1 ·
hi there everyone.:thumbsup
can someone tell me what the best oil to use in my 523i thats just touched 100.000 mile mark please. thanks mark
 
#4 ·
James Dixon

Hi ,
Forget the thin as water crap and run 10W50 fully/Semi synthetic. I have used this up until 200,000km and as it now sounds a bit coarse
I have switched to 15W40 semi synthetic for the last 20,000km. This ups the compression and gives a smoother quieter drive.
Unless you intend to thrash the nipples off it every weekend at the race track, fully synthetics are overkill.
A semi synthetic changed every 10,000km's(Don't forget to change your filter as well) a flush is also good, you will never sludge or damage your car and it should go beyond 400,000 kms.
Cheers Down under Australia James Dixon
 
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