Ok patman I know your going to say but I thought you used it last winter. Well the answer is yes, but that was another motor. This motor has been in my car for 2 months now. It was sitting for more then over a year before it ended up under my hood. Now last week I installed the gc and today I checked the dip stick and I ended up adding 500ml to bring it up back to full. It looks like oil is leaking out from gaskets and maby the rear main. So what do you all think I should do since winter get's down to -35C here and I can't affored to add half a quart every week. I never went low with using penz 5W-30 so what gives, can I keep using that.