OilSpecCharts from 83.5 & 90 OwnersManuals

https://picasaweb.google.com/109991183317103413704/March132013

        Note that each *w-50 has *w-40 right along side it ~ I think it is
interesting that those w-50s & w-40s share

the same HighEndTemp & the 10w-40 & 10w-30 also ~ to be correct all
the diff' grades should have their own range

bars

                                                                        ORR ~ DeanB

On 13 Mar , 2013, at 4:40 PM, <mcneely4@cox.net> <mcneely4@cox.net>
wrote:

> ---- OlRivrRat <OlRivrRat@COMCAST.NET> wrote:
>>> Dennis Haynes wrote:
>
>>>> The  *w-50 gives that viscosity edge the water boxer needs.
>>>
> OleRiverRat wrote:
>
>>>      I guess if you are talking about a really high milage H2OBxr
>>> that
>>> has not been well maintained that is probably true ~ otherwise I
>>> have not seen any info that would cause me to lean toward that
>>> philosophy.
>>>
>>>                                                                      ORR
>>>  ~ Dean
>
> How about the VW Vanagon factory owner's manual?  That is the
> viscosity recommended there for all except extreme temperatures on
> either end.  At the high end it recommends straight 40 weight, at
> the low end a lighter oil, I do not remember specifically, but maybe
> 10 or 20 weight.
>
> What waterboxer engines are not high mileage?  After all, the newest
> one around is 22 years old.
> David McNeely