Originally Posted By: aquariuscsm
I've used both and prefer Mobil 1.
Same here. My brother bought a 1997 Civic back in 2007. It had 90,000 miles at the time. It now has 289,000 miles. Aside from a couple of Amsoil oil changes, the rest of the miles was with either Platinum, and when Ultra came out, with Ultra.
We looked down the oil fill cap when he first bought the car, there was a good amount of varnish, pretty heavy in spots. I know other people have reported good results with Platinm and Ultra in regards to cleaning, but, we never really did see much of a difference, almost 200,000 miles later and there was almost no change.
Then, my brother said he wanted to try something else, so, these last two oil changes, we used Mobil 1. In just a short time, I can see a difference through the fill cap. Some of the dark areas are showing bare metal again, and these patches of bare metal are getting larger as the miles are racking up. Also the varnish on the rocker arms are lightening up, they were a dark orange/gold color, now they are almost an amber color.
I wasn't expecting much, so I was surprised to see what is happening.
Another plus, oil consumption is way down with Mobil 1. With Ultra and Platinum, there was steady consumption, to the point where I thought the car was borderline an oil burner. With Mobil 1, it is a lot less.
Also, the valvetrain is quieter with Mobil 1. I know, other people notice the opposite result, but, in this case, even my brother agreed it was quieter with Mobil 1 than Ultra.