Oil temp sender on '95 6.5 TD

I've posted elsewhere, but not gotten any responses. I am wanting to use my tranny temp gauge as an engine oil gauge, as well (electrical gauge). I can
get another sensor (1/8" NPT) that will work with my current trans. temp gauge. I'll use a switch to toggle back and forth on the two different wires
My question is where can I thread the 1/8" NPT sensor in oil lines or block to do this?
My transmission runs at about 150-170 degrees F when not loaded and fully warm. What should I be seeing on engine oil temperature?
Thanks, Snowman
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Needless to say, you've picqued my curiosity. Why would you be interested in oil temperature (what do you think it would tell you), and where on the oil flow path would you like to measure it? Generally, the temperature of the coolant in the block and the oil pressure are much superior indicators of engine status, so it intrigues me that you would want to monitor the oil temperature.
Engine oil temperature on this (and any other) motor is an interesting proposition. Obviously, it will vary greatly depending on where the sending unit/sensor is located. An easy location would be to tap into the oil pan or the oil cooler lines that run from the filter mount to the cooler in front of the radiator. You could cut either line and use a T with a flare or pressure fitting. While fairly simple, the temp would vary depending on if you used the supply or return line from the cooler, and even that would vary with ambient temperature. I can't think of anywhere else that would be convenient to tap into the block other than the pan itself.
Perhaps I could suggest two other alternate items to monitor that would be of greater value to you on this motor. The first is EGT (exhaust gas temp), which can be measured with a pyrometer gauge. There is already a hook up on the exhaust discharge of the turbo for it, and it would tell you a great deal about how your motor is performing. The second is turbo boost pressure. There are kits that mount these and other gauges on the driver's side A-pillar that look factory installed.
Good luck - Jonathan
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thanks, Jonathan. I already have a pyro, boost and trans. temp. gauges (on my color matched A-pillar). Reason for the engine oil temp, I guess... ...because the probe would cost me $10 and I'd only need to run a single lead wire. For that money, I'd have something else I could monitor regularly when towing hard.
I'd want it at the hottest place, as it exits the engine. Probably, I should wait until I make up new oil cooler lines to replace the leaky ones and just have a T fitting to put in at that time.
Thanks, Snowman

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Must be a pretty common place on many engines. The 427 Chevy I got an oil pan for a few months ago had two (2) plugs in the pan. The engine was in a c-7000 tandem grain truck.
Not planning to pull the pan for a few more miles, though.
Snowman

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