drjukebox (AT) gmail (DOT) com wrote:
Personally I am sold on synthetics for turbo charged cars, cars which
see very cold temperatures and cars which see very high temperatures.
Also for engine designs where sludge has been an issue such as certain
Toyotas.

John

In article <pighash-5987F1.10321102092006 (AT) news (DOT) isp.giganews.com>,
pighash (AT) aol (DOT) com says...


Not to nitpick, but what would be better about gold wiring?

Greg Farris <farris (AT) nasa (DOT) org> wrote:

Because of its high electrical conductivity and resistance to corrosion
and other desirable combinations of physical and chemical properties,
gold emerged in the late 20th century as an essential industrial metal,
particularly as a thin plating on electrical card contacts and
connectors. Relays that are for high currents have silver contacts and
those for low voltages have gold contacts. Many micro-chips use gold
internal wiring for its conductivity on very small cross-sections. The
most common choices are aluminum and gold and gold is superior.

Electrical resistivity are room temperature:

Aluminum: 26.50 nano-ohms per meter
Gold: 22.14 nano-ohms per meter
Copper: 16.78 nano-ohms per meter
Silver: 15.87 nano-ohms per meter


So for precise instruments, gold is superior because of its very low
contact resistance.

For high current applications, silver is superior because of its high
conductivity and moderate contact resistance.

Copper and aluminum are not useable unless the connectors are exotic
(not copper or aluminum) or the ends are plated. We all know about the
problems of aluminum house wiring and copper is not a lot better.

If you are using synthetic oil on an engine designed for conventional
oil, you are changing the operation of the engine. Synthetic oils have
smaller molecules than conventional motor oils. This means that it is
not compatible with some engine designs. If the manufacturer doesn't
recommend it, you use it at your own risk. If engines last perfectly
well with conventional oil, there is no incentive to take this risk.
--
Cheers, Steve Henning in Reading, PA, USA
Owned '67,'68,'71,'74,'79,'81,'87,'93,'95 & '01 Volvos.
The '67,'74,'79,'87,'95 and '01 through European Delivery.
http://home.earthlink.net/~rotarians/volvo.html

-----------snip ------------------
igns. If the manufacturer doesn't
Hi all,

I've found this thread to be very interesting.

For the sake of argument, lets say that one has been using a blend in an
older engine. What are the pros & cons of going back to a conventional
oil ?

Thanks,

Perk (:>)

--
Note --- My real email is perkatwavecabledotcom

Perk wrote:
The only pros are lower cost and less chance of leaks
developing in the future. The risk of leaks depends on how
long you're been using synthetic or syn blend; if a short
time, then the risk of leaks developing is higher than if
you've been using it for years.

Stephen Henning wrote:

So who here has had a B230F fail yet after regular oil maintenance with
a synthetic?

In article <pighash-0A812E.09054304092006 (AT) news (DOT) isp.giganews.com>,
pighash (AT) aol (DOT) com says...


Well presented - I'll give you that, but it does not establish a case
for the use of gold wires! Contacts, yes, wires - copper is far better,
cheaper and lighter, as your own numbers amply demonstrate!

Cheers.

Greg

In article <Q4ZKg.4458$y61.3296@fed1read05>, jmcgill (AT) email (DOT) arizona.edu
says...

There's good evidence that synthetic oil is superior to conventional oil
in some ways. But what Stephen has been saying (I think) is that no-one
has proved that these properties lead to longer engine life, on average,
than conventional oil would in the same make of engine under identical
usage conditions. As far as I know, no such tests have been done . . .
but if they have, I hope someone will post a link or reference.

Rick

Espressopithecus (Java Man) wrote:
]
In other words, no! You don't know anyone who reports increased engine
wear or decreased life using synthetic oil!

It does prove something -- it proves you are making conjectures without
data!

Perk wrote:


The pro is saving money. As far as the cons, who knows. Synthetic
blend is really a poorly defined term and many "conventional" oils could
call themselves a blend if they wanted to. In fact, the Connoco line of
oils (sold as Union 76, Phillips 66, Connoco and Motorcraft) are all
labeled synthetic blend.

John