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Re: diesel rated oils

To: MG List <>
Subject: Re: diesel rated oils
From: Max Heim <>
Date: Mon, 20 Nov 2006 10:06:37 -0800
I have read a similar article relating to American musclecars. One specific
point it made was to avoid oils with the API "sunburst" logo -- these are
optimized for fuel economy and have too few anti-wear additives. It included
a fairly technical description of additive packages and their function and

Although this article didn't cover them, I know a lot of musclecar owners
that have switched to diesel-rated oils.

I have also noticed that there are now a lot of "specialty" oils on the
shelf: "high mileage", "heavy duty", "synthetic blends", etc. It would be
interesting to see some kind of testing or analysis as to whether this is
all marketing fluff.

1967 Fastback
Johnny Lightning Muscle Cars USA #14
273 Commando
Factory disc brakes
Mountain View, CA

on 11/20/06 8:53 AM, Aaron Whiteman at wrote:

> In the November-December MOWOG murmers (the publication of the Puget-
> sound based MGCC), there is a rather interesting article entitled
> "oil is killing our engines".
> It is written by the head of a shop in Brush Prairie, Washington
> (Foreign Parts Positively), after a seeing camshaft failure and
> calling the manufacturer to investigate.
> Apparently the modern API oils lack the levels of Zinc, Manganese and/
> or phosphates to provide appropriate lubrication.  The article goes
> into more detail (alas, I cannot find a copy online--it seems rather
> good), but the gist is "use Diesel rated oil for flat tappet engines".
> I don't have any background in lubrication or oils--just that I
> religiously use GTX and always have.  This article has me considering
> a switch to Delo.  Has anybody else seen or heard other articles
> backing up the claim that modern oils are not-so-good?

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