On Mon, 26 Sep 2016 08:32:54 +0000, DerbyBorn wrote:
They are, but they're much more expensive and - in this instance -
20w50 will be the same viscosity as a straight 20 when it's cold. When
it's hot, it'll still be much thinner than it was when it was cold, but
not as thin as a hot 20. It'll be the same viscosity as a hot straight 50.
On 9/25/2016 12:25 AM, firstname.lastname@example.org wrote:
No, 20 is fairly thin. Personally I would use a spray formulated for
chains, this is "sticky" to reduce drips and is easy to apply.
Toolstation does one. That said, the Woolies one should be OK as well
=I'm sure that you've got that wrong; multigrade oil offers the characturistics of a thin oil at low temperatures to reduce friction when starting, and a thick oil at higher temperatures to protect bearings under heavy load.
Weight is an old fashioned or out of date term, but is indeed the W in
your 10W40. The number before the W indicates how thin or 'runny' the
oil is when cold. The number after the W indicates how runny the same
oil is when hot. Given that the oil on your chain is unlikely to get
hot, you can safely ignore the second number.
Your 10W40 is likely to be a little too thin, or runny, but the only
practical consequence is that it is slightly more likely to splatter in
use, and therefore not last as long. I would either use the 10W40 or
possibly find 20Wanything. If using the 10W40, check after, say, 400
miles and reapply if necessary.
The sewing machine oil will be even thinner than the 10W40, I would
Weight is as you say related to viscosity and relate to the SAE
designations. SAE 20 (single grade oil) is a 20 weight oil. Modern
vehicle oils are usually dual designation as your 10W40 where it
behaves as a 10 weight oil at low temperature and as a 40 weight oil
At room temperature 10W30 is pretty close to SAE20 single grade oil.
For a rowing machine chain, as others have said, almost anything will
where they recomend 3-in-one. I've still got some of the oil that came
with my machine and it's similar in viscosity so your Woolies is
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