Originally Posted by Matt Marks

To seal the bolt, we just in an aluminum crush washer like it was an oil pan and then another one on the sensor to make double sure. The factory oil level sensor (for the idiot light) just has the transceiver at the head from the factory, but has a a probe that goes down into the oil pan (see pic). to get temperataure I was thinking about modifying the probe so I could attach an Aim sensor at the head of it. However, I think next time time I do an oil change, I'll pull the 2 liter oil pan extension and just drill it and tab it directly so that the oil return points at it. The aluminum is thick enough.

Factory oil level sensor below for reference