Low oil pressure at idle + possibly sticky caliper

[adaz]

It happened second time now and I'm a bit concerned... Well, usually the oil pressure on idle stays at 2 bar but after a fairly short but spirited run the oil pressure drops to about 1 - 1.5 bar while the oil temp is at around 100 - 110°C then it's back to normal after a few minutes of normal driving.

Is this something that I should be worried about? I don't think this happened before though.

Another thing is the front left caliper - I can smell the brakes quite often and after 30 minutes of driving the wheel was really hot. Last time I could even see some smoke coming out from that caliper. Does it sound like a sticky caliper or should I be worried?

Also, is it something I could try to fix myself or should I just buy new calipers?

[shinny]

Oil pressure is a function of oil temperature and engine speed. At 800rpm idle and with 110ºC hot oil, 1.5 bar isn't unusual. What oil are you using? A thin grade oil and / or old mineral oil could easily explain pressure creeping a little lower.

Also, where are the sensors for both readings? Your pressure is a little lower than I'd expect ming to be, but I'm measuring both at the sandwich plate. If you're measuring temperature at the sump and pressure at the oil gallery then that would explain the difference between what I'd expect on my car and what you seen on yours.