Date:         Wed, 7 Jul 1999 07:10:13 EDT
Reply-To:     KENWILFY@AOL.COM
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         KENWILFY@AOL.COM
Subject:      Re: Syntec and Bosch Plat 4's experience
Comments: To: happycampers@picusnet.com
Content-Type: text/plain; charset="us-ascii"

In a message dated 7/7/99 12:44:41 AM Eastern Daylight Time,
happycampers@PICUSNET.COM writes:

<< "Part Synthetic
 Motor Oil". Check it out at your local FLAPS. >>

Just an interesting note here.  Almost all jet engines now use synthetic oil.
 They claim the internal resistance is less along with less tendancy to coke
at the bearings.
However for recipricating engines in aircraft you cannot use straight
synthetic.  They had a major sludging problem with it.  So you either use
straight dino ashless dispersant oil or a synthetic blend (which is what alot
of guys are using now).  They claim the blend actually works better in the
aircraft engines than straight synthetic.  It gives you the benefits of the
low internal resistance of the synthetic, along with the nice anti-sludging
properties of the dino oil.

Does this translate well over into the automotive world.  Not really since
the sludging problem that synthetic was having in AC engines is due to the
fact that they still use very high levels of lead in the fuel (100 low lead
has 6 times more lead than any leaded automotive gas).  This lead gets in the
oil and if it is not suspended properly, will cause severe sludging.  Since
we don't have any lead in our fuels (here in the US anyway) this is not a
factor.  However good suspension is a property that is very desireable in
oil.  Perhaps the synthetic blends are the way to go as well in automotive
engines.
Any thoughts or experiences out there?

I would think diesels would be even more prone to sludging and perhaps the
straight synthetic was the root of Karl's problem a couple months ago?

Ken Wilford (One with oil.  Got it smeared all over me all day long!)
Van-Again
John 3:16