It does seem thin to me also, now, though in the 1980s I used 10-30 in my
'75 MGB whilst living on west coast of Florida. Temps and pressures were
fine, and the car even towed a Laser class sailing dinghy around Florida and
to New England w/o excessive consumption. Engine had some 65M miles on it when
I got the car, and I added another 75M or so before my sister snagged it from
me. Compression was good at 150M miles too.
Bob
---------- Original Message ----------
From: "Paul Hunt" <paul.hunt1@blueyonder.co.uk>
To: <thgun@comporium.net>, <mgs@autox.team.net>
Subject: Re: [Mgs] OIL
Date: Thu, 26 Aug 2010 12:24:19 +0100
10W/30 sounds too thin to me, depending on your location. FWIW for the MGB
that grade is quoted for ambient temps between 10C/50F and -20C/-5F. For
temps above that it should be 10W/40 minimum, or 10W/50 or 20W/50.
PaulH.
----- Original Message -----
>I was asking about oil because I changed the oil last week. My oil reads
>40 - 50 while driving at about 50 mph. Idle drops it to near 20. I am using
>10w30 Castroil.
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