I installed this on
Chevrolet Optra

Review
although it is a W30 weight oil, it gives about the same FC as the 5W20 oil I used before. Cold starts heat up faster but not as smooth. price is alright when it is on sales, otherwise I would properly use other cheaper 5w20.

What I like
cold starts heat up faster.
same FC as 5w20 oil
value for money if only it is on sales.

What I do not like
price. For that price there are many other oil to choose from.

Review
I have tried so many brands/models of engine oils.
Redline, Shell, Mobil, Idemitsu, etc.

My vote goes to Mobil 1 Gold only. Take note that I mentioned the word, Gold.
If you want to go for Mobil 1, always select Gold model. Other than that, you can forget it. Those green cap or silver cap are wasting your money. :p

It did mention about fuel economy but to be honest, it is not as compared to 5W30 or 0W40 Gold models.

Go for Mobil1 0W40 or 5W30 Gold only.

What I like
Cheaper than 5W30 Gold by slightly.

What I do not like
Not as quiet, not as responsive and you can forget about powerful and smoothness in engine.

Review
Looking for cheap oil, Mobil 1 0W-30 will be a reasonable choice. But think again, might as well spend a few more bucks for a better one.
I am not saying that this one sux but to be honest, after trying once, I think it is not what I am looking for.

What I like
Cheap

What I do not like
Not as smooth, not as quiet, not powerful