Yes... It feels smoother... NVH has reduced... My AC is not working these days(Ahmedabad - 45' C) as Cooling Coil has a leakage(FASS doesnt have Cooling coil in stock... Wait is on) and so I have to keep the windows rolled down which I have never done... But it still doesnt feel noisy at all... Cheers... :up Neel - - - Merged Post - - - I also was considering Mobil Delvac 1 but did not find any authorized distributor here in Ahmedabad from their website... From other sources, found few dealers of Mobil Delvac 1... Visited them and they could not convince me that they will supply the ORIGINAL product. One of the good friend of my Brother in Law is working in Shell Company (Local Ahmedabad office), So I requested him and he procured 'Shell Helix Ultra' for me from the company directly. To get the 'Original oil' was the utmost priority for me(From the 2 options I had in mind - Mobil Delvac 1 & Shell Helix Ultra) Neel.