The previous owner of my car used Total for the 8 years they had the car and when I replaced the VCG, the inside of my engine was caked with sludge. I know they changed the oil regularly, but nearly all the driving was short trips, so I'm sure that contributed to what I saw. I switched to Mobil 1 0-40, as from what I've been told, it does a bit better in high heat situations; which is in line with my driving conditions.