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Slick 50 is the worst. It contains solid particles, teflon like =
materials. Like colesterol in human veins and such, slick 50 is the =
same when used over and over again. I sacrificed a '72 Dodge Slant-6 =
225ci just to see what it would do after hearing the same horror tales =
about it. I changed the oil every 3000 miles with filter and put in =
slick 50 a second time after 12000 miles. Granted if you read the =
instructions you wouldn't do this but figuring there are people out =
there that don't read and think more is better. Not long after using =
slick 50 a second time, my oil pressure started dropping. I was using =
an Autometer mech. oil pres. gauge at the oil pump and another one at =
the rear of the head that feeds the rocker shaft. The pressure =
difference was an enormous 32lbs. at 2500 rpm. Inside of another =
regular oil change, about 4000 miles more, the oil pressure was near 12 =
lbs at the head and 18 at the pump. It didn't take long for the number =
three rod bearing to spin and start making a racket. The engine had =
about 80k miles on it. I had another '72 Dodge Slant-6 225ci with =
around the same mileage and dropped it in. Used Penn 10W-40 with no =
problems until 149k when the factory oil pump itself failed. =20
I have an order for Prolong to try the same thing on a 90K+ engine that =
already doesn't burn or leak oil. No blow-by either. Oil change =
intervals will be 6000 miles with Mobil 1 and a single "treatment" with =
Prolong which is coming up soon. I too am wondering what will happen =
when you leave it in.
Smitty Nash
'92 Dak 3.9L Magnum
90K+
----------
From: Glenn & Lynn Vanderburg
Sent: Saturday, September 14, 2097 10:55 PM
To: dakota@ait.fredonia.edu
Subject: Re: Synthetic Oil
Ever see them paid commercials talking about their special oil =
additives?.
You know them as slick-50, duralube, prolong and the like. What I would
like to know if any of you have tried these and what you thoughts are on
them.
Glenn
----------
From: Smith L. W. Nash <railway@mindspring.com>
To: 'dakota@ait.fredonia.edu'
Subject: RE: Synthetic Oil
Date: Sunday, September 14, 1997 7:08 PM
I've been using Mobil 1 for awhile now and have no leaks to speak of. I
have 90200+ miles and no leaks since changing over at 85K. Although it =
may
be too soon to tell, the valve cover gaskets are original so that will =
be
the acid test on leaks. Since it doesn't leave a varnish as it breaks
down, it won't do as much damage as it cooks. My grandfather has been
using Mobil products since he owned his first car, a 1928 Pontiac Coupe. =
He swears by it still.
Smitty Nash
'92 Dak 3.9L Magnum
90K+
----------
From: Gary Ludwick
Sent: Sunday, September 14, 1997 4:30 PM
To: 'Dakota list'
Subject: Synthetic Oil
I've noticed discussion here from time to time from folks using =
synthetic
oil.
I also have a Mercedes, and yesterday received the current issue of the
Mercedes Club's magazine in which there is a long discussion among
mechanics, tech experts and MB service personnel on the merits of using
synthetic oil.
In a nutshell...NO appreciable benefit.
The only measurable benefit appears to be in SOME cases, a slight =
increase
in mileage...and that is negated by the high cost of the oil. The only
other benefit noted is easier starting in EXTREMELY cold environments.
One of the experts on the panel runs an oil analysis business. Does a =
lot
of work for large fleet companies, trucking lines, as well as =
individuals.=20
In a database of thousands of users, they could find no difference in
engine wear rates between regular and synthetic oil.
Synthetics attack some gasket materials and cause increased leakage. =
This
happens in some new vehicles. On older cars and trucks, as seals shrink =
&
harden, synthetics are MUCH more likely to leak. As one participant =
stated,
"Given the quality of motor oils today, synthetics have no place in the
market. With conventional oils, we have engines going 5,6,or 700,000
miles. What more could you want?!"
One other point: At least with Mercedes, you still must meet regular
mileage oil change requirements...even if you're using synthetic, or=20
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