I'm pretty good about adequately warming up my stock 2012 WRX before I drive it. If it's the first time I've started the car today, I let it idle for at least 5 minutes and then on the road I don't rev above 3k RPM until it's fully warmed up. But is the oil temperature a better indicator of when the engine is warmed up? I've considered getting a boost gauge and would prefer the two-gauge mount that goes on top of the steering column. So I thought maybe an oil temp gauge would be useful for the second gauge. I realize this is probably overkill with an un-modded engine, but I'm just trying to take the best care of my WRX.