Sorry if I'm hijack'n the thread.
I just changed my engine oil, I always do midway between services, but this is the first one I've had to do on my S15. I drained the oil out of the car on the jack, then let it down off the jack to drain the rest. Closed it all up, and filled her up. I filled it up to meet the maximum (H) on the dipstick and left the car parked there for a couple of hours, checked the levels again before I went out and it was the same. I've been driving the car all week with no problems but went to check the oil levels again today and its much higher than it had been. If Low to High is 100% its about 25% overfilled?? I'll drain it out before I use it again (just have to wait for the rain / thunder to stop) but why the massive discrepency?