I have a 1998 4-cam V6 Honda Passport with 55,000 miles. Broke-in the engine carefully and changed oil every 3000 miles(Except for a couple times ). The 1 hour commute to and from work requires a 30-45min. stop and go period and I encounter many long grade hills including a long steep one right before home. The weather here is 80-95deg all year long. I was considering using Chevron Supreme 10W-40 mainly because I can get it for $10 a case at Costco and because of reading some good reviews about it in this forum. Any recommendations? Thanks!