O T G Why?
Bonnie and I have a couple Tigers. One personalized and the other modified. I have never considered adding an oil temperature gauge to the personalized Tiger.
TigerBlue is the modified car and monitoring oil temp seems like a good idea running open track events in California. Not talking 50 second autoX but lapping a race track in high ambient temps.
The PO was doing that too and he did the dash with a mix of SW and stock instruments including the oil temp. In this machine with an 8 Qt. pan, oil temp was always running about 10 degrees hotter than coolant temp. Adding an oil cooler from an RX7 reversed that with oil temp running lower
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I consider oil temp knowledge important information on track because the car is running very hard. But it is still secondary to water temp because losing coolant can result disastrous/destructive temperatures in a hurry.
Also the oil pressure gauge is a better tell tale that one of the engine bearings is eating itself.
That said I have not experienced problems and a recent tear down of the engine showed no evidence of oil system issues. The small block Ford is a pretty trouble free engine when you maintain the fluid levels and it is tolerant of hard running.
So... in an application where red needles and stock appearance are important why bother with an oil temp gauge at all?
Rick