We live in CO. WY & NM also have 85 octance, most areas it is 87, 89, 92 octane ratings. In Denver it is 85, 87 & 91.

Thanks fazool

Hi all: Got a 2002 S80 T6, had it for just a couple of months and it now has 109500 miles. The wife put 85 Octane without knowing. Now the check engine light is on. So, how can I get the codes to know what the check engine light means? And how can I reset the check engine. I saw another post on this...