John, I stand corrected since I read incoming e-mail in reverse from latest
to old received.
With only 16K miles, there is no problem at all to return to dino oil either
due to cost or preference of taste. However, on engines that have extreme
wear, you find that Mobile 1 is known too leak at the seals or gaskets when
converting in high mileage vehicles. However, I had read so where and I do
not have the web link here (Scottish Engineering firm) where some one did a
test of using Syntec oil in the beginning, then switch back, and found
problems with the engine after adding dino oil.
Even I tried this on a manual tranny with low tolerance or wide spacing,
which the seals began to leak and problems in the gearing syncing. I had to
refer back to the 80/140 HD oil and the oil leak stop but it mess the second
gear in the tranny.
--------------------------------------
Steven St.Laurent
C4i System Engineer
C4i Engineering Branch, PSD, MCTSSA
MARCORSYSCOM, U.S. Marine Corps
Office (760) 725-2506 (DSN Prefix: 365)
"Never be content with somebody else definition
of you. Instead, define yourself by your own beliefs,
your own truths, your own understanding of who
you are. Never be content until you are happy with
the unique person GOD has created you to be."
-----Original Message-----
From: John Neff [mailto:jndneff@texas.net]
Sent: Monday, October 07, 2002 9:14 AM
To: DML
Subject: DML: RE: Re: Mobil One Syn 5-30
Ron,
I never said it was you, or asked you, to prove the statement of "once you
go to synthetic, you can't go back". I'm looking for a response from Steven
St.Laurent since he's the one who made this comment.
I very much aware of sludge buildup and it creating a false seal, etc.,
etc., etc.. Not running an engine for 6 months at a time does not create
sludge as you point out, but it does allow seals to dry out and crack.
I'm not jumping you either. This is one of those threads where two people
are agreeing on something (you and I) and in the process, we're arguing to
the same point.
John
<snip>
Actually, the true reason for the warning on older engines is because of a
possibility of sludge buildup. Some of this buildup causes a false seal in
these older engines that synthetic oil may dissolve. That is where the
leaks come from. If you have a car that doesn't run for six months at a
time then no sludge is forming but if you don't change the oil you may end
up with other problems. I never said you couldn't go back to dino oil on
any car, though on a newer one, I don't know why you'd want to.
...........................
<unsnip>
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