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Re: [GMCnet] Blackstone Labs and ZDDP oils [message #109503 is a reply to message #109480] Wed, 22 December 2010 20:19 Go to previous messageGo to previous message
Dennis S is currently offline  Dennis S   United States
Messages: 3046
Registered: November 2005
Karma:
Senior Member

Fred,
I can appreciate how frustrating this has been for you.
If I remember you have also done compression tests and the results were guite good -- indicative of a strong engine. Really a puzzler.

Dennis


Dennis Sexton
73 GMC
Germantown, TN
USA



-----Original Message-----
From: fred veenschoten <fredntoni@cox.net>
To: gmclist@temp.gmcnet.org
Sent: Wed, Dec 22, 2010 5:42 pm
Subject: Re: [GMCnet] Blackstone Labs and ZDDP oils



Robert Mueller wrote on Wed, 22 December 2010 16:54
Larry,

I went to SAE 40 Royal Purple because I think it is an oil consumption issue
related to engine speed and going to a single viscosity oil might help. This
may be wishful thinking but I had a chat with the manager of the NAPA store
where I bought the oil and the Royal Purple customer service engineer and
the consensus that it would be worth a try to see what happens. If it didn't
help it was an engine / ring / valve guide issue.

The engine in Double Trouble was rebuilt by Ken Frey about 50,000 miles ago,
had no sludge in the valve covers when I replaced the gaskets, no sludge in
lifter valley just the "normal" burnt on crud when I swapped over to the
aluminum manifold, and virtually none in the crankcase when I replaced the
single drain oil pan with the dual drain.

Regards,
Rob M.
USAussie - Downunder

-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Larry
Sent: Thursday, December 23, 2010 4:19 AM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Blackstone Labs and ZDDP oils



you are aware that it takes some time for all the oil to run back to the pan
so when you stop for gas your oil will always read low for about 20 minutes.

Fred V
i've had consumption problems since buying my coach in '06. i first went to
obil 1 oil with no change. since then i've changed the intake valve seals to
he "positive seal" type, changed to the proper PCV valve, changed to the
orrect valve covers, calibrated the dip stick, all with no change in oil
onsumption. my engine was rebuilt 20K miles ago by the PO. i suspect a bad
ebuild, probably rings or loose fitting pistons. i gave up and am looking for
n engine to build and have ready when needed.
--
red V
77 Royale RB 455
'cola, Fl
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Dennis S
73 Painted Desert 230
Memphis TN Metro

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