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I don't know Sammy, I have filled up my 455 Buick at Arco and it pinged, 91 octane, I filled up my 383 Chevy at Arco and it pinged, 91 octane, I use Chevron and they don't ping, maybe my cars just don't know any better. Plus like I said in the earlier post, they charge to use a debt card. I never used Arco in my Porsche and don't use it in the Z3.
I drove by the Arco in Dana Point this afternoon and it was $4.25 for 91, no reason to go there.
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