David W.,
Pennzoil is made from Pennsylvania crude. All Penn crude oils are VERY
high in paraffin wax, which is not the best lubricant. This wax is easily converted
into sludge. This is why Pennzoil has a very high level of detergents: to keep
the sludge suspended until the oil is changed.
Many years ago, a peddler at the Minnesota State Fair had a display. He
was selling a synthetic oil. His display was 10 different cans of 10W-30 oil
sitting on top of a block of dry ice, which melts at –40F. Each can had the top
removed and a paint stir stick in the can so you could feel the viscosity of
the oil. The synthetic was about the same as a common 10W-30 at room
temperature. Several petroleum oils felt about like 90 weight gear oil. Some
others were thicker. The Pennzoil was a 3 inch ball like a carmeled apple on a
stick when I held it up. It was solid. Not good for a cold engine to run for 5
minutes with no oil flow until the engine heats up enough to melt the oil.
Pennzoil is probably adequate in most circumstances. Many people have
driven their cars lots of miles without an engine failure, even Arnold Palmer. Their
car may go even farther with a different oil. But I wouldn’t use it unless you
change it frequently, before the detergent is overloaded, say 2000 miles. Or
use it in a cold weather climate where it gets solid. Or in a hot climate where
the paraffin breaks down faster.
But all of this is just my opinion. Anybody know of a real scientific
study of motor oil performance??
Dave Homstad
56 Dodge D500
-----Original
Message-----
From: Forward Look Mopar
Discussion List [mailto:L-FORWARDLOOK@xxxxxxxxxxxxx]On Behalf Of David Wallace
Sent: Thursday, October 05, 2006
6:18 PM
To: L-FORWARDLOOK@xxxxxxxxxxxxx
Subject: Re: [FWDLK] Oil Pressure
on 1955 Poly
Why not
use pennzoil?I have used it in all my cars for 45 years with no problems. I use
only 30 HD in my 58 Fury. I tried 10-30 once but the engine was very
noisy. A quiet engine is a happy engine.
David
Wallace 38 year 58 Fury owner
-----
Original Message -----
To: L-FORWARDLOOK@xxxxxxxxxxxxx
Sent: Thursday, October 05,
2006 2:59 AM
Subject:
[FWDLK] Oil Pressure on 1955 Poly
Tom,
One reason it takes time to
build up your oil pressure, is your oil is too thick. A straight 30 weight oil
will be too thick to flow rapidly through the oil filter to the bearings when
starting a cold engine. Try using a 10W-30 weight oil, or maybe a 10W-40 if
your engine is high mileage and you drive mostly in warm weather. Do not use
Penzoil.
All oils get thinner (lower
viscosity) when hot. Multiweight oils are much better because they do not thin
as fast as a straight weight oil. With a 10W-30 oil, it has the viscosity of a
10 weight when cold for quick oil flow at start up, and of a 30 weight when hot
for good shear strength for bearing protection.
Ron is correct, your oil is
probably draining back into your oil pan. This is common on older engines when
the clearances inside the oil pump grow, allowing the oil to leak back into the
pan. When the engine is started, the oil filter needs to fill up again before
oil will be sent to the bearings.
One fix for this oil leak
down problem is a modern spin-on oil filter. These have anti-drain back valves
in them. This is just a flap of rubber that prevents oil from draining out of
the filter back to the pan. With a full filter, oil pressure will come up much
faster during start up, which is MUCH better for the bearings. Hot Heads (P/N 21002) sells these adapters:
http://www.hothemiheads.com/dodge/oiling_system/oil_filter_adapter_30d.html
Dave Homstad
56 Dodge D500
-----Original Message-----
From: Forward Look Mopar
Discussion List [mailto:L-FORWARDLOOK@xxxxxxxxxxxxx]On Behalf Of Ron Allyn Swartley
Sent: Wednesday, October 04, 2006
11:57 PM
To: L-FORWARDLOOK@xxxxxxxxxxxxx
Subject: Re: [FWDLK] L-FORWARDLOOK
Digest - 3 Oct 2006 to 4 Oct 2006 (#2006-17)
Oil Pressure on 1955 Poly engine Plymouth
Tom,
When the cars sits
overnight the oil drains into the pan. When you start it up and the idle goes
high,----- that is the mains rattling because the oil has not gotten to them
yet. It is better when you change oil because the new oil travels faster
then the old dirty oil.
I recommend
that you maybe clean the screen on the pickup in the oil pan just incase
it is a little clogged and maybe add a can of STP or my favorite Dura
Lube. The Dura Lube will free your engine up and the idle will go up about 100
to 250 RPM just minutes after you pour it in your car. When you shut the car
off it will stay on the metal parts.
Ron Swartley
-----Original Message-----
From: Forward Look Mopar
Discussion List [mailto:L-FORWARDLOOK@xxxxxxxxxxxxx]On Behalf Of tom taylor
Sent: Wednesday, October 04, 2006
12:31 PM
To: L-FORWARDLOOK@xxxxxxxxxxxxx
Subject: [FWDLK] Oil Pressure on
1955 Poly
When I first start my 1955 Dodge with the 270 Poly V8, the oil
pressure takes 5 or so seconds to get the guage moving and up to operating
pressure. It runs around 45 pounds at idle once it builds up or at least
that is what the guage shows. If I pump it and let it crank and idle and build
up, no problems. If it goes up past idle at start, I hear what might be
mains rattling. It seems to improve when I changed the oil. I run
30W in it.
Any ideas what the cause is?
Tom Taylor
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