[Healeys] Oil grade for 100 Le Mans

[i erbs]

I only run 20/50 in my Healey and MGB
Ira Erbs
Milwaukie,OR
      _______                                  _______
     (______ \____1959 BN4____/ _______)
         (_________________________)
          BT7 engine and disk brakes


1967 MGB  [image: MG]

A racing car is an animal with a thousand adjustments. Mario Andretti
Please excuse random auto corrects and misspelled words


On Sun, Mar 20, 2022 at 1:45 PM Michael Oritt via Healeys <
healeys at autox.team.net> wrote:

> Through a stupid mistake on my part today I purchased eight quarts of
> 20w50 synthetic Amsoil rather than the 10w40 I normally use year-round.
> Unfortunately I discovered this mistake this afternoon only after I
> completed the oil/filter change.
>
> I am concerned that this higher-viscosity oil might in some way damage my
> engine.  It has been about 60-70K miles from the engine's having been
> professionally rebuilt and while oil pressure has fallen somewhat over the
> last several years the gauge still indicates about 40 psi at 2500-3K rpm's
> and about 20 psi at fast idle with 10w40, in both cases with hot oil and at
> normal engine operating temperature.  I took the car for a very short spin
> after completing the change and I am quite sure I did not did not get the
> oil up to full operating temperatures but in any case the OP did seem a few
> psi higher than what I am used to seeing
>
> At this point I have about $125.00 invested in the mistake:  seven quarts
> and a new K&N filter.  If my fear is verified by your opinions I am
> certainly willing to drain and refill--I certainly do not want to be
> driving around if there is a real risk of causing damage.
>
> I eagerly await the group wisdom.
>
> Best--Michael Oritt
>
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