Just bought myself a pair of VDO aftermarket gauges, One being Oil Pressure (psi) and the other Oil Temperature (C). The Oil pressure guage is a simple enough setup with the "T" piece in the line. However, after talking to a few auto electricians about the oil temperature sender, they have said that I need to drill the sump on the car to mount it correctly or put it in a spare oil gallery. The engine in Question is a X20XEV in an Astra F Sport. For those that have installed an oil temperature guage, what and/or where did you install it? Is there any way of obtaining a reading via the factory ecu rather than drilling into the sump?