Picdude wrote:

> BTW, a more accurate hokey idea for measuring RPM would be to measure
> oil-pressure and have some proper temp compensation (actually measuring oil
> temperature).  I am willing to bet it would be FAR more accurate than
> measuring voltage, but I stress, it's still a hokey way to do things.


Except if you have an old car like I used to and didn't bother to change
the oil. It actually turned into grease.

The oil pressure will change depending on the condition of the engine
and oil filter, and type of oil used.

A friend of mine has a 1975 Harley Davidson and only topped up the oil
when needed. He did this for over 15 years and never actually changed
it. The bike is still going today.

regards

Tony

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