[DeTomaso] Racing Oils - The Good, The Bad and The Slippery

[Ken Green]

Gary,
 
    I know there are always arguments for both sides of a question.  My opinion of synthetic oil is from over 30 years of using it in every vehicle I have owned.  The first use was in a Yamaha 1100.  I used Amsoil and changed it about every 10,000 miles versus 2,500.  After over 40,000 miles, it still did not use any oil and ran like new and looked new inside.
 
    I put 180,000 miles on a 98 Buick Regal GS changing the oil about every 15,000+ miles.  The engine got better mileage at 180,000 than new, and the heads etc. were never off, did have to replace the supercharger at about 120,000 mile.
 
    I understand that modern engines last a lot longer, but probably not with conventional oil changed at 15,000 miles.  My guess is that conventional oil oxidizes when it hits a hot surface, and creates sludge etc.  I don't think synthetics do that, and that is a big deal for engine life.
 
    Others may have different experience.
 
Ken
 

--- On Sun, 7/3/11, GW <gow2 at rc-tech.net> wrote:


From: GW <gow2 at rc-tech.net>
Subject: Re: [DeTomaso] Racing Oils - The Good, The Bad and The Slippery
To: "Will DeMelo" <wdemelo at cogeco.ca>
Cc: arkoch at earthlink.net, detomaso at realbig.com
Date: Sunday, July 3, 2011, 11:35 AM


I have some view on synthetics. While synthetics are very slippery they 
can have some pitfalls. I have heard of individuals who have switched to 
pure synthetics and during very brief interruptions of pressures during 
turns had main and rod bearing failures; It happened that quick. It is 
so slick it does not stay on the surface as long as dino oils. I know of 
one individual who vows never to run pure synthetics again although 
blends may be ok.

A second problem came about when Shell made a pure synthetic oil for 
aviation. They soon found engines were not making TBO (time between 
overhaul). Propellers were also failing (propellers which change 
position through oil. What they found was syntetic oil could not break 
down sludge the way dino oils could. Shell was sued by several engine 
makers and lost quite a bit over the deal. As far as I know there are no 
pure synthetics for piston airplanes anymore. There are for turbines of 
course but that is a different animal.

The problem with sludge in aviation came because avgas still has some 
lead in it. The synthetic can not break it down. Now we don't run leaded 
fuel in cars but there are still things in blowby synthetic still cannot 
break down as well as dino oil.

Now they add additives for this, for that, to help break this down, to 
help extend the viscosity range, but before you know it there more 
additives and less and less oil.

For these reasons I avoid full synthetics.

Gary



Will DeMelo wrote:
> For those that are running strokers, are the majority using synthetic or
> dino oil? Can you just switch from one to another?
> I've read a lot about oils and I'm still confused as to what to use.
> Will
>
> -----Original Message-----
> From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com] On
> Behalf Of arkoch at earthlink.net
> Sent: Sunday, July 03, 2011 10:53 AM
> To: detomaso at realbig.com
> Subject: [DeTomaso] Racing Oils - The Good, The Bad and The Slippery
>
> Given the interest of many folks on this forum on what oil to use in their
> Pantera, the following article from the June issue of Engine Builder has an
> insightful and informative article on "oils".  Go to the following web site
> if you are interested in the subject:
>
> http://www.enginebuildermag.com/Article/88994/racing_oils__the_good_the_bad_
> and_the_slippery.aspx
>
> Also, if you haven't subscribed to the free Engine Builder magazine, I would
> highly recommend it. When you subscribe, they also send a weekly email that
> covers various topics.
>
> Additionally, the online site is very informative on many engine subjects.
> The site provides access to prior magazine issues and articles.
>
> Dick Koch - Atlanta
>
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