Best conventional with lowest wear would likely be Valvoline. From UOA reports around here, Valvoline produces some of the lowest wear numbers. The oil isn't the best for any kind of extended drain, but for regular changes, say between 3-5k miles (depending on driving conditions, time, etc) its probably the best for it. I've also seen quite a few cars pass 200k and 300k using only VWB, so it's good as far as engine longevity is concerned too.