One very annoying thing I notice about my car is that when I sit idling for more than 3 minutes somewhere, the car starts to blow out blue smoke, a noticable amount.
It does not do it when I start up or when stopped at lights or when I park for less than a minute or two - there is no smoke at all then.
I am using Semi-synth 10w30 Esso (about 1000KM ago it was changed)
Also, whn idling should the oil gauge not be within the normal zone? Mine is not, only when accellerating and driving does it stay within normal, stopped it dips about 1/8" to 1/4" below the low normal mark. When first started, it stays on the high side of normal until the engine warms up.