I forgot that I can't post from work, and was reminded that some of you
might find this reply of interest.
Enjoy, Fred Talmadge
Elva Courier Home Page
www.96trees.com
>From: Fred Talmadge <FTalmadge@flow-products.com>
>To: Fred Talmadge <fredtal@industryinet.com>, Phil Bates <jello@ida.net>
>Cc: Fred Thomas <vafred@erols.com>,
> "triumphs@autox.team.net" <triumphs@autox.team.net>,
> "british-cars@autox.team.net" <british-cars@autox.team.net>
>Subject: RE: Maximum oil temp - was O/D
>Date: Tue, 10 Jul 2001 13:35:00 -0500
>X-Mailer: MailBeamer v3.34
>
>Okay this is what I've discovered so far...
>
>1. Most people can only touch 120 degree surface for about a second.
>2. If a surface is ribbed/finned it will feel cooler than a smooth
>surface.
>3. If you spit on it and it "boils" then you are at about 212 degrees.
>4. Now for the confusing part. In our business (pumps) we state that the
>temperature of the surrounding metal should be below 175. This is based
>on old lithium based greases. Modern Polyurea greases are good for
>upwards of 350.
>
>What does this have to do with motor/transmission oil, nothing. The main
>difference is that the type of oil we use does not have to deal with
>friction, at least to the point that engines and transmission do.
> Sometimes we receive motor oil as an upgrade to what we specify. I'll
>blame it on the heat and my rush to answer a question for jumping to a
>conclusion.
>
>FYI the Chevron site is easy enough to navigate and you can download
>datasheets on the various properties of oil and fuels.
> http://www.chevron.com/prodserv/nafl/automotive_motor_oils_fs.htm
> select datasheets and you can find more info than you may want to deal
>with.
>
>Also Ed Hackett seems to have proliferated his article "More Than You
>Ever Wanted to Know About Motor Oil" on lots of web sites, 174 according
>to Google, might as well direct you to this one
>http://www.vtr.org/maintain/oil-overview.html
>
>
>Fred Talmadge
>www.96trees.com
>
>
>
>
> -----Original Message-----
>From: Fred Talmadge [mailto:fredtal@industryinet.com]
>Sent: Monday, July 09, 2001 7:17 PM
>To: Phil Bates; Fred Talmadge
>Cc: Fred Thomas; triumphs@autox.team.net; british-cars@autox.team.net
>Subject: Re: Maximum oil temp - was O/D
>
>
>
>
>175 degrees is the temperature that most standard greases start to break
>down. At least that is what we tell our customers who complain of "hot
>
>bearings" How that relates to motor oil was a bit of a guess, and I'm
>going to have to look it up. After a quick look up on the Chevron site
>the numbers for oil and grease don't look like what I remember. So I'll
>go
>to work tomorrow and look up our datasheets.
>
>Fred
>
>At 04:09 PM 7/8/2001 -0600, Phil Bates wrote:
> >170 seems pretty low to me. In my other car, where oil is both
>lubricant and
> >coolant (you figure it out), the oil runs 220 on a regular hot day
>basis,
> >and the
> >owner's manual says not to worry about it until it hits 265.
> >
> >Phil Bates
> >58 MGA
> >67 MGB
> >misc. other stuff.
> >
> >
>snip
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