I filled up at costco yesterday. Price was too good to pass, 3.49 for 92gas with extra 3% discount. I was a little worried about the gas quality so I did a little data logging. 10 mins of driving including multiple WOTs up to 6300RPM. Pulled the log to my computer and wow. I see 3.5 degree of ST KNK! I have been keeping track of different gas brands. So far my results are:
Chevron: 0 ST retard. 14 fill ups
Shell: 2~2.5 ST retard. 5 fill ups
76: 0 ST retard. 3 fill ups (This 76 station is right next the costco I filled up yesterday)
Costco: 3.5 ST. 1 fill up.
All the gas are 92 grade. At least from my data sets, Costco gas surely is worse than other named brands.
__________________ Mods: A LOT. She is DONE. No More Modding for a loooong time
Filled up Friday at Shell with their Premium, I received 55 cents off through FuelRewards so 3.25 a gallon... ever since my 07 rt has been rumbling and shaking.... not like its gonna die out or anything just very jittery at all times.
Wish I had money for a tuner to log my stuff lol. It used to feel like Shell would make it cruise with noooo prob and this recent fill up changed that idea. Marathon also made it smooth out but expensive so ill stick to Thorntons and hope its not bad gas lol.
'07 Charger RT
TorRed or NoRed!
K&N CAI + crankcase filter(baby Spectre cone air filter)
Costco gas is a s#!t mix. I called to see what brand they purchased and was told by the manager that they purchase whatever they can at the lowest price. So seems they sell week old leftovers.
I'd never let my SRT drink that crap.
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