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Re: Problem with my MG...

To: "James H. Nazarian" <>
Subject: Re: Problem with my MG...
From: John Cahoon <>
Date: Tue, 7 Dec 1999 06:40:06 -0800 (PST)
In my 26 years experience of testing and formulation
oils for automobiles, I have seen much information
about long drain intervals.  My general opinion is
that anything over 3000 miles is asking for trouble. 
Short trip drivers should consider 2000 miles as a
better limit.  Anyone using higher mileage for a drain
interval could easily cause premature engine failure. 
BTW, the manufacturers care NOT AT ALL if your engine
blows at low mileage.  As long as they meet their EPA
targets, everything is fine with them.  The last
couple of oil standard 'upgrades' have actually been
downgrades leading to cheaper products nad thus
reduced costs to the manufacturers of the vehicles.

JOHN CAHOON ==================================

--- "James H. Nazarian" <> wrote:
> Too many odometers in too many MG's told a similar
> tale. It isn't carved in stone
> that the engine must be rebuilt at that mileage,
> only something I have observed in a
> bunch of engines. Another theory I have (no way of
> testing) asks if the contest the
> auto makers used to have going that pushed the
> recommended oil change intervals into
> the realms of ridiculousness (i.e. 15000 mi. or even
> 20000 mi) may have had their
> adherents, and thus a flock of cars with prematurely
> blown engines. IMHO it is better
> to change the oil at a shorter interval than 15000
> miles.
> Jim
> wrote:
> > At the risk of being pelted with bad connecting
> rods I
> > am going to throw this in the air...
> > Doesn't 60K-70K sound early for a rebuild?
> Especially on
> > the cars equipped with oilcoolers and O/D?
> > I have 2 1975 MGB's that are used for pleasure,
> have an
> > unknown history, over 100K on the clock and only 1
> has
> > an oil cooler. Yet both run well and do not have
> > excessive blowby or oil consumption. My every
> summer day
> > car is not babied and the engine is probably the
> only
> > part that I have not had to perform repairs on
> (other
> > than regular maintenance). (My father has the
> other B on
> > extended loan).
> > All opinions welcome!!!!
> >                                    Robert Dusel
> >                                    75 MGB x 2
> > > Bob,
> > >
> > > How many miles on the engine? 60-70K miles or
> some multiple of that will almost
> > > definitely spell rebuild time.

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