When I had a 1990 Carat the local VW shop--a very good one--said I should
never use synthetic oil in a waterboxer engine as it was not made with
tolerances that matched synthetics in molecular size. Can't vouch for the
fact, but I never used synthetic in the engine and the cylinders still had
the original hatching and burnt no oil after 250K miles.

Jim

On Fri, Jul 22, 2022 at 9:51 AM Eric Caron <ericcaron96@comcast.net> wrote:

> Good to know.
>
>         I think I’ll weight on trying the 60 weight oil until engine oil
> pressure or age indicate it.
>
>         I’ll stick with mobil 1 synthetic 15w 50 for now but I’m glad to
> hear the 40 weight serves folks well as I wonder how easy my current oil
> will be to get in the future.  Down south I struggled to find more then 30
> weight in Walmarts as we traveled.
>
> Eric Caron
>
>
>
> > On Jul 22, 2022, at 1:41 AM, OlRivrRat <OlRivrRat@comcast.net> wrote:
> >
> >               EC
> >
> >       I have never ever used anything heavier that 10w40 in My or
> Friends H2O Boxers
> >
> > & if a OilChange comes due in Fall I’ll go with 0w40,,, Been doing that
> since My very 1st
> >
> > H2OBoxr in 83.5 ~ Also, Nothing but Full Synthetic once an Eng is done
> with BreakIn ~
> >
> >
> >
> >> On 21 Jul , 2022, at 7:57 AM, Eric Caron <ericcaron96@COMCAST.NET>
> wrote:
> >>
> >> Hi guys,
> >>
> >>       I’ve been using mobil 1 15W 50.
> >>
> >> It was very hard to find down south but locally still at Walmart and
> the price was low when I last got it.  I hope it is still there when I go
> back.
> >>
> >> I noticed the info here is for 40 weight.    And still a water boxer..
> Don’t most use 50 weight or some even 60 weight?
> >>
> >> Eric Caron
> >>
> >>
> >>
> >>> On Jul 21, 2022, at 8:44 AM, Tom C <thomas.casal@GMAIL.COM> wrote:
> >>>
> >>> It’s actually only a gallon so it’s not super cheap but cheaper and
> >>> obtainable locally.
> >>>
> >>> On Thu, Jul 21, 2022 at 8:40 AM Tom C <thomas.casal@gmail.com> wrote:
> >>>
> >>>> Hey guys,
> >>>>
> >>>> Mobile 1 15w-40 is getting hard to find locally. What do you guys
> think of
> >>>> the diesel oils like this the shell rotella stuff like this
> >>>>
> >>>>
> https://www.autozone.com/motor-oil-and-transmission-fluid/engine-oil/p/shell-rotella-t6-diesel-engine-oil-hd-full-synthetic-15w-40-1-gal/354130_0_0
> >>>>
> >>>> 32.99 for 5 quarts is way cheaper than the 9.99 a quart for the
> mobile 1.
> >>>> I don’t mind paying the extra but if this diesel oil is just as good
> may as
> >>>> well save a few bucks. Thanks for any comments. Peace tom
> >>>>
> >
>