I installed this on
Mazda 3

Review
I have tried grade W40 oil for all my previous oil change. This is the first time changing to grade W30. Initially, after changing this oil my fuel consumption increased and my ride did not seem to have improved response. I was disappointed. To my surprise, this oil benefits and the pros came after running about 500 to 800km. This oil give great response, fuel consumption decrease and the RPM change very swiftly on gear change. This is a must try oil and is very reasonably price. However, my engine seems to be nosier a bit than before. I guess is the grade that I used. Now I am able to drive a bit more aggressive without increasing the fuel consumption.

What I like
Great response (accelerate faster)
Gear change very swiftly
Good fuel consumption (increase of about 40km per tank)
Reasonably price

What I do not like
Engine slightly noisier.
Benefits came after running about 500 to 800km.

I installed this on
Audi A4

Review
I was mostly on a mid grade engine oil, thus I never had a taste of how it is like to drive with a fully synthetic. These Synergy Diamond PAO+ 5W-30 Fully Synthetic was definitely my best first. It had provided me with a better performing engine that responses well, and I simply love the ride I am getting everytime. I don't track, but I do drive slightly aggressive now when I'm used to the awesomeness of my engine, and I figured, after testing with a lower grade engine oil, that this oil definitely unleashes what your engine has to provide!

What I like
Unleashes what your engine has to offer.

What I do not like
They are quite costly.