David,
I used Chevron Delo in a previous TR3a for years with absolutely no problems
and I always thought I had a little more oil pressure with it when things
got hot. I didn't use it because I knew why it was good stuff, only because
it seemed like a good idea. Thanks, now I know why I'm using it in the
present TR3.
Rob Robertson
-----Original Message-----
From: Davgil@aol.com <Davgil@aol.com>
To: triumphs@autox.team.net <triumphs@autox.team.net>
Date: Thursday, October 14, 1999 1:18 PM
Subject: Questions about oil
>
>To the list
>
> There is an article in the November issue of Car and Driver by Patrick
>Bedard (page 23) about the right motor oil for "keeper cars" that I found
>very interesting and I would like to ask some of the real experts on LBC
>ownership about a couple of points. In the article he states that "For our
>seldom-driven oldsters, (Ed) Kollin reckons that corrosion is a much bigger
>problem than wear, even the wear from starting an engine that's been
sitting
>long enough to drain oil off most of its rubbing surfaces-because one
little
>patch of rust on that same rubbing surface is doomsday". I have always
>understood that the primary wear on an engine was during the initial
startup
>until the oil was delivered to the critical components, I never thought
about
>the effect of corrosion on those components. When questioned about the
best
>oil for an older, seldom driven car he later stated in the article "…for an
>off-the-shelf blend, he would choose a "heavy duty" oil intended for diesel
>trucks. Instead of SJ (Spark Ignition) on the can, look for combinations
>that begin with C (Compression Ignition). CG-4 is the latest, preceded by
>CF-4, CF-2, CF, etc. A few blends meet both C and S requirements. While
the
>oil part of these diesel oils has the same lubricating qualities as
>passenger-car oil, the most common heavy duty viscosity is 15W-40; more
>syrupy. But the diesels get bigger doses of the additives; up to 80
percent
>more ZDDP, and 30 to 50 percent more detergent, dispersant, and corrosion
>inhibitors". In the article he states that ZDDP is the primary anti-wear
and
>anti-oxidaton additive but it is used in smaller quantities in regular
>passenger car oil because it has an adverse effect on the catalytic
converter
>which I assume is not a concern for our cars.
>
>He goes on to state that the negative for using this type of oil is that
the
>nitrogen compounds in the high does of dispersant may cause some seals to
>leak and that if you have not used a detergent oil before, you could wash
>loose a chunk of sludge that could clog a hydraulic lifter. His comment
was
>that heavy-duty oil was the silver bullet solution for corrosion as it is
>blended to neutralize the sulfuric acid produced by high-sulfur diesel
fuel.
>My questions are these:
>
>1. Does anyone on the list have experience with using this oil instead of
>regular passenger car oil?
>2. Is there sufficient concern for the additional leaking seals (on an LBC
>-yeah right) to steer away from this oil?
>3. Other than the cautions mentioned above, can anyone think of any other
>concerns to guard against?
>
>Since I am a true rookie, I would appreciate the thoughts of some of the
more
>knowledgeable list members. As an aside to Joe Curry, maybe fluif has a
>diesel application. TIA
>
>David Gill
>'76 TR6
>
|