I'm not sure if someone already posted this question but my 2009 3.5 v6 engine#2GR-F2 and oil cap say 5W-20 but the dealer keeps putting 5W-30. So I took it back and told them to change it. They charge $29 bucks for oil change which is about the cost of the parts it I were to do it myself. My question to you pro's is, is it ok to put 5W-30 when my oil cap says 5w-20. I live in southern CA and it is hot. The coldest temp it get is about 55 degree in cold winter. I wouldn't call it winter compared to the east coast.No long distance driving but aloooot of stop and go traffic. Any advice will be great. Thanks.