Changed jobs and am now working in the field. I got a 02 Honda Civic with 176k in a horse trade for a work beater because I am putting a lot of miles on. Car takes 5w20, I have pretty good stock of 5w30. I am going to ask a newbie question because I dont know a lot about Hondas. Should I just run the 5w30 all the time or just run 5w20 for the winter and 5w30 for the summer or just forget about 5w30 and run 5w20 all the time? Thanks