I think the oscillation is due to your oil pressure relief valve
cycling between open and shut.
**********************************************************
> Related question: Why does my gauge oscillate between 50 and 70 psi
> at hot idle? This only happens maybe 30% of the time, and I haven't
> been able to correlate it to anything.
>
> --
>
> Todd Mullins
> todd@nutria.nrlssc.navy.mil On the lovely Mississippi (USA) Coast
>
> '74 MGB Tourer
>
> "A life lived in fear is a life half lived."
>
Jerry Causey
antiques@whidbey.com
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