Has any one installed an oil temperature gauge in there Bonneville? I have a 1994 and I was think about installing an oil temperature gauge. What are the procedures for installing these?

When I had a '67 VW Bug I installed a VDO Oil Temp Gauge only because it was an Air Cooled Engine and if the oil got too hot it would lose its lubricating properties and eventually you would lose the engine. But with "modern" vaser-cooled engines there is not much of a need to monitor the oil temp(unless your car is NASCAR certified).
But I guess it would not be too difficult to do. The easiest ones have a Dip Stick Sending Unit that are wired to the gauge.

I think a transmission temp gauge would be more valuable to you. I have one, and wouldn't be without it.

I know this doesn't really answer your question, but on the whole, wouldn't it be more useful to have a transmission temperature gauge? I mean, you've already got coolant temperature shown, and you can figure that your oil is going to be at something similar, but the factory gives you no feedback at all as to how hot your trans is getting...

Oh, Duh... I just read your .sig again and I see you _have_ a transaxle temp gauge already... okay, never mind; I'll just go back to sleep now...

Me too. Sorry about that. I don't think oil temp would be that useful. Just like Andy said, the coolant temp will provide the same feedback.

Maybe a voltmeter or ammeter to counteract the failure-prone alternators?

Installing a voltmeter or ammeter will counteract the failures?

(I also took a picture of my car so that now no one can steal it... )

-- Andy (ducking as an alternator bounces off his monitor...)