At 11:34 AM 10/20/2009, Don Hanson wrote:
>   My 84's gauge responds slowly, I've noticed.  There must be some kind of a
>dampner in the system keeping the gauge from bouncing around or something.

It's a bimetal element with an electric heater, just like the temp gauge.

Uphill or left turn or high-crowned road makes the gauge read low;
downhill or right turn makes it read high.

Yrs,
David