Hi lads just a quik post regarding oils I recently has my vy serviced and my mechanic used mobil 1 10w-30 and since driving it for 2 weeks my motor has become noisier not so much on startup but more so after its been driven and parked for some time eg 2hours when I start it again I can here gudgeon pin like noises so this weekend I will be draining my mobil 1 and useing penrite HPR15 has anyone else had similar experiences with oils. :b:
The LS1 seems to be sensitive to oil type for some reason. And what is good for one, doesn't necessarily work for another. I have been running Mobil 1 5w-50 for about 10,000k know and apart from some minor lifter noise for about 60 seconds at startup it is as quiet as a mouse. I would do exactly as you said and go back to your previous oil, although in saying that, If you are still under warranty straying away from the recommended 10w30 could give holden an excuse to void your warranty.
