Hi Skip,
I'm interested in this synthetic vs ordinary oil debate continues.
My engines are all fed regular Valvoline or something with an SH
rating. Oil is changed at 3M miles, along with the filter. Buick and
S-10 V-6 oil drains dark. MGB and TD engines drain black My reasons for
changing are that: the book says to; there may be odd pieces floating in
an old engine; the oil additives are aging. From what I read, the
oiliness of the oil is still OK at that age, so I'm really replacing the
additive package.
Since you are using synthetic, do you think its advantage is the
"everlasting" nature of the lubrication in provides? Is there less metal
wearing off the moving parts?
Are the operators of serious equipment all changed over to synthetic,
guys such as the railroads, trucklines, greyhound, etc?
Is your '96 Volvo a marine diesel?
Curiously,
Bob
On Sat, 25 Oct 1997 09:22:12 -0700 Skip Kelsey <kelsey@value.net> writes:
>David:
>
>Just for info. I use Amsoil synthetic 20/50 in all my LBCs.I change it
>at
>10,000 miles or two years. I have had it analised several times, and
>have
>been told that I could have continued running it. I use it in
>conjunction
>with an amsoil spin on filter, which filters to four microns. Most
>filters
>only go to twent five microns. In my 96 Volvo, I use Amsoil 15/40
>Marine
>oil with very positive results. Volvo recommends 10,000 miles per
>change. I
>have done 40,000 miles total. It uses NO oil between changes. Analysis
>showed that the oil was perfect, with very low contaminants.
>The transmissions on the LBCs use Redline MT-90, 75/90.
>I was using MTL, but changed to MT-90 in the GT with O/D. Both seem to
>work
>very well.
>I am sold on synthetics. For breakin of a fresh engine, I am partial
>to a
>Straight SAE 30 oil, such as Castrol. This is mostly to set the life
>of the
>new cam and lifters. Most cam manufacturers agree with this regime.
>
>Cheers:
>
>Skip.........At 10:37 PM 10/24/97 -0500, Darby wrote:
>>Hello Jamey:
>>
>>Thanks for the note. Castrol does have a loyal following especially
>in LBC
>>and motorcycle circles.
>>
>>Some of the best recent documentation I've seen of objective testing
>was in
>>an issue of Motorcycle Consumer News. I don't remember the exact
>issue, but
>>seems like it was in June or July of 1996. If you are interested and
>can't
>>find it, drop another note and I will try to locate it for you. They
>did
>>some testing of major brands of motor oil over a fairly long
>timespan. They
>>looked for viscosity breakdown, foaming, and a few other parameters.
>The
>>only lubricant that outscored Castrol 20W/50 was Mobil 1, a synthetic
>oil.
>>
>>It is easy for people to form allegiances to particular brands and to
>>foster prejudices against others, all without a lot of hard data. I
>know a
>>fellow who religiously runs Quaker State because that's what his
>father
>>used. I am sure you know of other instances. There are lots of
>excellent
>>brands of motor oil, but the important thing for equipment longevity
>seems
>>to be oil and filter change at frequent intervals. For my hardware, I
>>change every 3,000 miles or 6 months whichever comes first.
>>
>>David F. Darby
>>White River Valley, Missouri
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>>
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>>
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