Quoting presterone:
I ran ams oil 10w40, drove the car a week, it sat for two weeks and I went to start it and it sounded like low compression. I had actually thought my t belt snapped, but its good. The lifters were ticky when cold the entire time I've hhad the car but it didn't worry me much.
You run 10w/ 40 in maine? In the winter?