I know that the new Celicas have digital sensors and that digital is much more accurate than analog, and I was noticing that once you drive for a while you're engine heat stays at a 45* angle right? Well, in the morning I always heat my engine to that point, drive to school, and leave the car parked and off (duh!). But when I come back it's all the way back down. My parents say that once a car has been driven at least once a day, you don't have to heat it up again. My question is, should I heat it up even though I had already done it in the morning?
If you know something about cars, mechanical gauges are way better because they don't have the tendacy to give false readings, and they don't happen to get a short in the circuit.
All you gotta do is fire it up, and drive. Just don't drive hard while the engine is cold. The oil pump turns on as soon as the engine is started, so you don't have to wait long to drive it.