I drive a 2006 Honda Accord with the 2.4 i-vtec. The owners manual specs 5w20 with 0w20 being an acceptable alternative. Ever since I learned that 0w20 was acceptable, and now even being recommended I started using only 0w20 oils. Now that winter has passed I have been considering using a 5w30 synthetic on the thin side of the 30 weight spec. So a SOPUS synthetic in other words. My driving style is 1-5 miles to work twice daily depending on which route I take. At least twice a week I run errands, all of which are 5 miles or less. I am able to drive on the highway about once every two months, its then that I take the opportunity to give the throttle a little work out (not hardly abuse just letting it rev up to 4500 while entering the freeway) but even then the highway drives are only 15 miles one way (so 30 miles round trip with most of those being the stop and go getting to the highway, actual highway driving time is only about 2.5 miles before I exit). So in typical BITOG hair splitting fashion, I ask, Is there any benefit to running a 5w30 in my application? I only ask because I dont like the cam lobe wear marks I see on my cams, also I wouldnt mind having the extra oil film for the times I like to work out my right foot. Also, lately Ive seen on here how so many run a grade thicker and say theres nothing wrong, and how 0w20 is only for CAFE and not long term wear, as other countries with the same engines use thicker oils. I just have to wonder, could there be any long term benefit from a wear stand point? Or should I stick with my 0w20? I really want/need this car to last as long as possible. I want to prevent all wear that I can. I always take it easy (less than 3000 rpm) until the oil is warm, which hardly ever happens. I always use synthetic or synthetic blend 0w20 and a Fram Ultra oil filter, maybe a Honda Genuine if I feel like it. What say you for my summer OCI...stick with 0w20, or bump up to 5w30?