http://www.pennzoil.com/technology-of-clean/motor-oil-comparisons/
I was looking at Pennzoil's comparison chart and it it shows the Ultra has the same amount of seal conditioners as their High Mileage oil. This doesn't seem to be the case for the Mobil 1 line as far as I know. Unless it's completely marketing and that most of the High Mileage oils really just contain a bit more ester??
I was looking at Pennzoil's comparison chart and it it shows the Ultra has the same amount of seal conditioners as their High Mileage oil. This doesn't seem to be the case for the Mobil 1 line as far as I know. Unless it's completely marketing and that most of the High Mileage oils really just contain a bit more ester??