I have been running top tier gas for quite some time <Shell mainly>, and am trying to figure out, which is better? Shell, or Chevron? I have heard that the 3800 takes a liking to the Shell V-Power, but I have also heard good things about Chevron with Techron too. Opinions? I also use 88 octane, so take that into account also <Midgrade around here>
Any other selections welcome too.
For the record, these are the current top tier stations, and the ones in blue are ones I have around here:

QuikTrip
Chevron
Texaco
MFA Oil Co.
Conoco
Phillips 66
76
Entec Stations
Shell
The Somerset Refinery, Inc.
Kwik Trip / Kwik Star
Aloha Petroleum
Tri-Par Oil Co.
Turkey Hill Minit Markets
Mileage Stations
Road Ranger
CountryMark
Chevron Canada
Shell Canada
Petro-Canada
Sunoco Canada

I use BP unless I have no other choice. 93 octane, however, some of the stations only have up to 91 here.

I mostly use Super America just because it'* convenient, 91 and an octane booster. There is one right across the street from my work and two and a half blocks from home.
After reading Dan'* post, I'll be switching to BP for the 93

Sidenote: Dan does BP have it'* own refinery?

I believe they do. They used to be standard, then amico, now BP

I always get good gas from BP stations

i ususally use BP or Shell, i've never gotten bad gas from either. I used to use speed way untill i got some really bad gas in my tow car and i only got like 8mpg

Speedway here. Not sure where they get there fuel from.

Mobil is the only one around with the 93, most premiums are 91 here. It Mobil or a couple Mom and Pop outfits

I use whatever brand the local Stop & Shop buys. Mainly because I get somewhere between 5 and 45 cents off per gallon, depending on how much stuff I've bought in the stores.

Then again, I'm NA. If I've ever gotten a bad tank of gas, the engine must have just chewed through it normally.

I have had the best luck with shell v-power, its always fresh, if its not i can certainly tell
i mean my car tells me