It is 11 degrees here this morning with a -6 wind chill. Car ('99 Crown Vic PI) was sitting out all night as usual. Started up immidately with Chevron 10W30 with no indication of thickened oil (funky noises etc.) I just changed the oil again last weekend. This will be my third fill of Chevron Supreme 10W30. I purposely used a cheap SuperTech ST2 filter. I'm going to run this fill 4K miles and then send it off for analysis. I'll post the results when I get there. I've got another 3400 miles to go on this fill. I'm very pleased with this oil so far but the analysis results should speak volumes.