Anyone tried it?
Just did an oil change and going 0W-30 instead of usual 5W-30.
Doesn't feel any different from cold start to highway driving.
0W flows faster at startup than 5W. The colder it is, the bigger the difference. Every second faster helps in my view I use Mobil 1 0W-20.
At operating temp, a 0W-20 and 5W-20 are similar thicknesses.
"Better results" is quite general - an oil has to do many things at the same time. The viscosity rating is a measure of viscosity related performance, and that's it. A lubricant company can choose to use an additive package that doesn't even meet the minimum API licensing requirements, one that just meets minimum requirements, or one that exceeds the minimum requirements by some amount (a little or a lot).
The "W" stands for winter. The first number is the weight of the oil at start up and the last number is the weight at operating temp. People mistakenly think that it stands for weight, which is wrong.