Regarding high statistics that show that most customers at a service center who have clogged injectors, etc, buying their gas from the same, local, lowest-price retailer, all I have to say is...DUH!
The local Ford dealer was telling me that he would avoid the local, lowest-cost gas retailer (a local Wawa...those not familiar with that retailer just think "regional 7-11") because most of the people with clogged fuel filters and the like were buying their gas there. Well, since it is 1/2 mile from the Ford dealer, and most people that go to the dealer are local, and since the supplier had the lowest gas prices by far, common sense would dictate that most of the people with fuel line problems probably buy their gas there. That doesn't mean there is an issue...assuming a certain # of people with fuel line problems are expected.
TJR