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[St] NMC: Oil's well that ends well, now Cap it



JohnS wrote: Well that is just Mobil producing the two different oils that
the market needs. On one side you have the automotive people, their oils
need all the friction modifiers that they can reliably use. They need them
to make
the oil perform better under the conditions that automotive engines run in.
Then there are the motorcyclists that also have hi rev-ing engines with
extreme protection needs, but also have wet clutches to complicate the
calculations.

Not so fast there buddy.
Oils not well with all of the car guys.

Those of us with 30+ year old muscle cars have a whole other problem with
today's oils.
The EPA dictated the removal of Zinc and one other additive about two years
ago.
then about a year ago muscle car motors started failing as the old oil was
used up and the new oil started getting used.

That's no problem with roller cams, as most new motors have, or low
pressure points at the cam to rocker arm point with low lift cams.

But those of us who have 60 and 70 era muscle cars have another disaster
happening.
Cams are going flat at a alarming rate.

The removed zinc caused the oil to adhere and keep the cam wet but now the
oil is draining down in cars started only a few times per month. And the
dry contact points during start up is a killer.

Within a few thousand miles the motor is wasted.
As the metal wears away from the cam, is stopped by the filter, the bypass
valve kicks opens up, and soon you have completely unfiltered oil
circulating throughout your motor.

There have been a large number of completely destroyed motors and it wasn't
until the cam manufactures started investigating that the problem was
isolated. Crane Cams in particular lead the research.

The solution for us has been Shell Rotella R diesel oil. It still has all
the additives we need for older high performance motors.
But alas, the EPA is on the verge of eliminating it in diesel oil also.
Our only alternative then is a engine rebuild and the installation of a
roller cam or special (high $$$) racing oils that have the additives.

Time rolls on.


Jack "Rude Dog" Hays
972-952-5065
"I'll see you on the dark side of the Moon"

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