I had 20w50 in my D150 when i was up camping in VT a few weeks ago. There was a cold snap and it was 5 or 10 below over the night and the high was 12 that day. I had to move the truck in the morning so i had no choice but to start it.

It started right up but oil light took along time to shut off and the lifers sang for a wile. I just let it idle until it warmed up and the lifters shut up.

I wouldnt try and start a new motor like that unless i really had to.

I was asked to contribute money to help solve the civil unrest in Egypt, but I suspect it's some sort of pyramid scheme.