One of the trucks I drove for work a few years ago was a turbo diesel truck, and my boss was very insistent that I let the truck idle for 10 minutes after a long run to cool down the turbo. There was also a sticker next to the ignition about how important it was to cool down the turbo. I have heard about that before, but I'm not sure if its necessary in all turbocharged vehicles. Should I idle my 2012 wrx after a long and/or hard run to cool it down?
Also I'm concerned about the recommended service intervals.. They suggest every 7500 miles or 7 months.. I know its synthetic oil, and you can go farther with synthetic between oil changes.. But 7500 seems like a lot. I also don't drive a while lot. I have a van I use for work, so since I got the car in may, I've only done 1200 miles. Id feel comfortable doing service every 3 months, but am I just wasting money doing it that frequently? Also should I be doing my first service sooner since I have no idea how long my car has been sitting around with the oil in it from the day the engine was built?