----- Original Message -----
From: "JIM ETCHEVERRY" <ETCHY1@comcast.net>
To: "Bill&Sue" <5zq@cox.net>
Sent: Tuesday, April 05, 2005 12:29 PM
Subject: Re: [LML] Re: Oil and warming up


> Guys  I like to chime in on this subject since I know (a little) about it.
I
> am Jim Etcheverry and I am in the lubricants business and have owned 5
> planes from a Taylorcraft to a Aerostar with manuel wastegates. First Bill
> is completely right about MobilAV1 and the reason why a Staight synthetic
> does not work as well as a semi-synthetic. The "petroleum base" product
does
> a good job of scavenging the "grey paint" caused by the leaded fuel. This
is
> why Shell decided not to offer a 100% synthetic. Next the real  problem
with
> "cold oil" is START-UP. Have you ever heard the Slick 50 ad "it is a
> terrible thing to start your engine." All the oil is in the sump and if
you
> notice you"ll have not oil pressure for a moment or so. So LOW RPM at
first
> until oil pressure in up. This is why the new multi-vis oil are great.
Flows
> like 15w at start-up and performance like 50 at temp. You probably don't
> know that the Aeroshell 50w we used to use is the same viscocity as SAE
90w
> gear lube. This gives you idea how hard start-up is on the engine. Before
> 15w50 most of you in cold weather places would use 40w in winter and 50w
in
> the summer. Next "AUTO OIL" DO NOT USE THEM IN AVIATION ENGINES PERIOD.
> Aviation engine require Ashless Dispersant oil and auto oil use ash . Ash
> when heated ( such as a lean out engine) will form carbon and become
> abrasive. You could use auto oil and have no problems if you never got the
> oil real hot , but it is not the way to go. I like the new Exxon probuct
> because they have extra rust and corrosion protection. They have sited
ASTM
> D 1748 test for rust protection and CrC L-38 test for acid number increase
> or corrosion protection. Remember the saying of heating your oil up to 180
> to burn off the condensation, these extra additives are exactly what our
> plane that sit for long periods of no use need. I have used Aeroshell
15w50
> since it came out and love it , but this Exxon product really looks good.
> Check it out at the next Airshow you attend. Oil is like politics,
everyone
> has a view point on it. Jim- Schaeffer Mfg.
> ----- Original Message -----
> From: "Bill&Sue" <5zq@cox.net>
> Sent: Sunday, April 03, 2005 9:39 AM
> Subject: Re: [LML] Re: Oil and warming up
>
>
> > >  With all these comments about thick cold oil, I' wonder why no one is
> > > usingac
> > > 100% synthetic, which was given top marks in an extensive test by
> Aviation
> > > Consumers many years ago... the leading ones being BelRay and ... and
> alsohow> > Mobile 1.
> >
> >
> >
> >
> > Hello Terrence,
> >
> > If you use 100% synthetic, just be sure not to use leaded aviation fuel.
> The
> > 100% synthetics leave what is called, I believe, "grey paint". Seems
that
> > they don't scavenge the lead. Mobile Av1 was taken off the market
several
> > years ago because of a large number of problems and law suits over this.
> >
> > Todays solution seems to be the semi-synthetics such as the multigrade
> > AeroShell and more recently Exxon Elite. I have used the Exxon Elite in
my
> > engine for almost 1,000 hrs (except for break-in). It has performed well
> and
> > allowed easy cold starts. Has all of the advantages that you site above
> and
> > is designed for leaded avgas.
> >
> > Bill Harrelson
> > 5zq@cox.net
> > N5ZQ  320  950+ hrs
> > N6ZQ   IV   1%
> >
> >
>