I think you should sign an agreement with Volverine bro first of providing him your valuable chartered services, lol!
Volverine bro, you can keep taunting 2C, but are you a Jadoon? Lol!
Seriously.
Anyhow, back to the pumps, I totally agree, one of my cousins running his pump since past 10 years clearly told me that the MOST sincere station would cheat by 10%, leave the less sincere ones!
I think it's an investment one could survive best in, if location is outclass and one has sales enough to avoid Haram. Otherwise, your heavy investment will force you to take the forbidden daana!
The best pump I've seen is the one at Kashmir point, when leaving for Muree from Islamabad. Such a guy could really do without haram, don't know of your experiences?!??
Volverine bro, much easier business could yield you more, a Petrol pump is just kind of status bolstering, and course, an invite to the devil.
Regards.