Recently, there was a post (UOA?) of 5w-20 oils and increased wear when the engine was lugged around at low RPM's. IIRC, this was peformed on a Ford truck... Anyone find this thread? Honda calls for 5w-20 in the latest 3.5L V6 models, I have an '04 with 2500 miles on it. I noticed how low the RPMS are when going through some of the hills around here...1000-1100RPM. It produces a decent amount of torque that low, but it strains the engine until it downshifts. The trans will downshift as expected, but I just don't like the fact that 5w-20 oil is in this thing when it's being revved so low. 5w-30 it is!