I buy BP because they were brave enough to change from British Pretoleum to Beyond Pretrolium and shows their take on exploring and investing in new fuels so they get my busineiss whether or not it hurts my Caliber.mldvenm said:Honestly, I think it depends on the car. If your car requires just 87 octane then it is obviously not very sensitive and probably won't run bad on whatever you use unless you get a bad batch of gas. If the car requires premium fuel then it is more than likely very sensitive(NSRT4) and needs to have good gas all the time with no inconsistencies and this is why using a fuel with additives mixed in to clean things up like chevron w/ techron or shell v-power does you good. I filled up with valero 91 in the srt4 one time and I was sputtering all over the place and it might have been due to lack of additives or maybe mixed up tanks and I was pumping 89 or 87 instead of 91. I drove down to a station that sells 100octane at the pump and put 5 gallons in on top of that tank and it ran fine again. Needless to say I never had problems with chevron or shell and I never used the cheaper gas ever again. Of course it all depends on whether or not the car is performance oriented. That would obviously make one car more prone to the "bad gas effect" than other cars that just require 87.