You should search the forum. There is a longish thread on fuel pumps and quite a few Chennai pumps, good and bad are mentioned.
One of the threads is: http://www.team-bhp.com/forum/street...ations-11.html
I am sure there are others containing useful information.
In my experience you just cannot go wrong with Shell pumps. The quality is good and you are never shortchanged on the quantity. I use shell regular for city drives and super for highway jaunts.
You can consider the shell at pallikaranai, or the shell on arcot road, opposite vadapalani bus stand and next to vijaya health centre. I also like the small BP petrol bunk on RK salai, heading towards citi centre, and away from yellow pages building.
Yeah, I remember reading that. Has not happened to me so far. Basically, I do not get into any conversation with these guys even if they approach me with free offers. I do not even disclose what I need until I reach the car's petrol tank lid. I tell them my requirement only after that. They kind of get the message that they cannot mess with me.