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From: J. Clarke on 9 Oct 2009 06:23
Rob Kleinschmidt wrote:
> On Oct 8, 7:01 pm, "J. Clarke" <jclarke.use...(a)cox.net> wrote:
>> Rob Kleinschmidt wrote:
>>> On Oct 8, 5:26 pm, "Stephen Cowell"
>>> <stephenleeNOSPAMcow...(a)gmail.com> wrote:
>>>> I've got a buddy
>>>> that *had* to have Mobil1 installed before he took delivery...
>>>> his bike puffs white smoke when he gets on it, still, after
>>>> three years.
>>
>>> Good point. I suppose "new Dnepr" isn't really an
>>> oxymoron after all. I don't particularly believe synthetic
>>> damages seals though.
>>
>> Not so much damages as they don't respond the same way.
>
>> one of the objectives in formulating
>> different motor oils is to produce the same degree of swelling in
>> common seal materials. If an oddball material is used then going to
>> a synthetic lubricant might swell it more or less than it is
>> supposed to resulting in either a too tight or too loose seal.
>
> Common explanation seems to be early synthetics may have
> had problems but current generation don't.
>
> http://www.popularmechanics.com/automotive/how_to/4213451.html

Look, my point was not that synthetics cause seal problems, my point was
that this is a Dnepr, a Russian bike that uses Russian seals which may be
made of materials that the people who make oil never thought to test. I'm
not saying that they ARE made of such materials, just that one should be
aware of the VERY REMOTE possibility that they are.

>> As for rings not seating right, depends on the oil and the design of
>> the engine--some exotic cars come with synthetic these days.
>
> I recall going through at least one grade of lighter oil
> followed by one oil change of dino before going to synthetic.
> On an air cooled engine though, I wouldn't run anything else
> and yeah right from the factory on some not so exotic newer
> engines too I think.
>
>> If the guy's bike puffs _white_ smoke when he starts it, that's
>> coolant, not oil, and he should find out why it's happening rather
>> than assuming that
>> it's because synthetic oil prevented the rings from seating.
>
> Common advice I've heard for new rings is "ride it like you
> stole it".
>
> I'd probably try synthetic on a Dnepr myself. Works fine on my
> fairly similar '80s era BMW airhead.

Personally I would and if started to leak then I'd go back to dinosaur blood
and see if it stopped leaking.

From: Stephen Cowell on 9 Oct 2009 10:49

"J. Clarke" <jclarke.usenet(a)cox.net> wrote
> If the guy's bike puffs _white_ smoke when he starts it, that's coolant,
> not
> oil, and he should find out why it's happening rather than assuming that
> it's because synthetic oil prevented the rings from seating.

OK, I'll have him check the antifreeze in his Wide Glide...
it happens when he *gets on it*, not on starting, btw.
__
Steve
..


From: Stephen Cowell on 9 Oct 2009 10:52

"Beauregard T. Shagnasty" <a.nony.mous(a)example.invalid> wrote
> Stephen Cowell wrote:
>
>>> Does your Dnepr
>>
>> Read the manual? In Italian?
>
> � �� ����� ��� ����� ���� ���������� � ���������. :-)

Well, then... you obviously didn't download the manual from
the link that was presented... did you?
__
Steve
..


From: Beauregard T. Shagnasty on 9 Oct 2009 11:36
Stephen Cowell wrote:

> "Beauregard T. Shagnasty" wrote:
>> Stephen Cowell wrote:
>>>> Does your Dnepr
>>>
>>> Read the manual? In Italian?
>>
>> ?Ӡգݐ졧㜠۝ٓΠҫܐ ސࠕ葢ѝΠР٢ћ?ە. :-) [ <- was Cyrillic text ]
>
> Well, then... you obviously didn't download the manual from
> the link that was presented... did you?

No, sorry I didn't. I also don't see that you presented a link to an
Italian version (or any language) of the Dnepr manual. No manual link
elsewhere in the thread that I see either.

Oh, there was a smiley there ...

--
-bts
-Friends don't let friends drive Windows
From: Vito on 9 Oct 2009 14:23
"Rob Kleinschmidt" <Rkleinsch1216128(a)aol.com> wrote

> I don't particularly believe synthetic damages seals though.

I agree. Some will sneak past them better than dino blood.


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