Terry,
I'm no expert either. However what I do know is that one of a diesel oil's
rated abilities is the capability to hold and disperse soot, such that the
viscosity doesn't increase and also so that wear numbers don't increase
because of it. It is diesel rated oil's ability to be so detergent and hold
the particles that is important.
Gasoline engines don't produce much carbon (soot), so the detergent
capability of a diesel rated oil will far exceed what a gasser needs, in
that regard. Mobil Delvac 1, and Rotella blue bottle are those types of
oil. Also, most of the modern diesel oils are on the thick side of a 5W40,
which is perfect for a Healey engine.
Most of the really good oils rated VW505 or better contain all of the
extreme pressure additives that we need. Mercedes uses oils like this in
it's newer diesels. Like I said before though, just because an oil has a
1200 or better Zinc rating by oil analysis, doesn't mean that the Zinc is in
a form that helps you. It is truly a matter of process.
Cheers,
Chris
_____
From: TERRY COLL [mailto:coll44@msn.com]
Sent: Sunday, May 20, 2007 11:40 AM
To: Chris Masucci; 'John Snyder'; healeys@autox.team.net
Cc: Gary TR4A Fitzgerald
Subject: Re: OIL - beware
I'm no expert but perhaps diesel oil holds more soot due because diesel
engines inherently run a lot dirtier than gas engines. Just speculating.
Terry Coll '64 BJ8
----- Original Message -----
From: Chris Masucci
Sent: Saturday, May 19, 2007 7:26 PM
To: 'TERRY COLL'; 'John Snyder'; healeys@autox.team.net
Cc: 'Gary TR4A Fitzgerald'
Subject: RE: OIL - beware
Wrong, wrong, wrong! If Diesel rated oil doesn't have the "cleaning
ability", then how in the world could it possibly disperse and hold so much
soot? Ever wonder why oil run in a diesel is sooo black. Because it holds
soot BETTER!
Don't get me wrong, I am not suggesting that diesel oils are the end all be
all. I am suggesting that the diesel oils not claiming to increase fuel
economy and reduce emissions, have all of the high pressure additives that
we are looking for. They need not necessarily be zinc.
Cheers,
Chris
BJ8
TDI
-----Original Message-----
From: owner-healeys@Autox.Team.Net [mailto:owner-healeys@Autox.Team.Net] On
Behalf Of TERRY COLL
Sent: Saturday, May 19, 2007 8:11 AM
To: John Snyder; healeys@autoxteam.net
Cc: Gary TR4A Fitzgerald
Subject: Re: OIL - beware
John et al,
I was advised at a recent British car show that diesel oil should not be
used
in gasoline engines. The gent who I spoke with is a machinist and said
something to the effect that it doesn't have the cleaning properties of the
oils formulated for gasoline engines. I've cc'd him in the event I mistook
his advice.
Terry Coll '64 BJ8
|