Go check it out bro. 1 liter top up every 2k-3k km is not normal. I just came back from MSpeed. Had some leaks at the lower part (i.e. oil sump, o-ring, etc...). So got that fixed. But a lot of work (1 whole day) as need to remove transmission, exhaust, etc.... to reach the part. Also, found out sensor was faulty so changed that as well.
So you might also want to check out your sensor. So far with new sensor- travel 30 minutes and it still shows MAX. With old sensor, upon start up about 5 mins, will show MAX; after 15 mins HALF, then about 30 mins "MIN". If your sensor shows such symptoms, best get it changed. RM280 at MSpeed.