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Re: winter oil, summer oil...my mechanic's view (archive)

[ Follow Ups ] [ 5-series (E28) Message Board ] [ Msg. Board FAQ ]

Posted by horst on September 07, 1999 at 13:40:01:

In Reply to: Re: winter oil, summer oil...my mechanic's view posted by wildjoker on August 30, 1999 at 02:59:13:

: Has anybody else ever heard of this admonition to stay away from 10-40W?
: Thanks. Joker

YES - 10/40 is a wide range, you're asking 10W oil to performm at 4 times it's natural state. With 20-50, you're only asking the 20W base to perform at 2.5 times it's natural viscosity. 10/40 is not recommended by m/c makers either. Personally, Mobil1 15/50 Synthetic is my choice.

Horst.


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