85 octane???
07-23-2007, 01:17 PM
#21
Join Date: Jun 2007
Location:
Posts: 27
RE: 85 octane???
The higher the altitude, the lower octane you need. I travel to New Mexico often, and I use their 86 octane without any problems. Down here at lower altitude, I always use the 87 octane. (and this is on my Continental which calls for 91 octane).
As for the octane differences between the US (and Canada) and Europe/Australia, we here in the US use the average of the Research and Motor methods to get octane numbers. Ever notice on the pumps, it says "R+M/2"? Thats what it means. Because I drive in Europe, the lower octane numbers are 95 which I believe is equal to our 87 (R+M/2). Their high octane is listed as 98 which I believe is equal to our 91.
Motor Method always reads lower than Research Method.
As for the octane differences between the US (and Canada) and Europe/Australia, we here in the US use the average of the Research and Motor methods to get octane numbers. Ever notice on the pumps, it says "R+M/2"? Thats what it means. Because I drive in Europe, the lower octane numbers are 95 which I believe is equal to our 87 (R+M/2). Their high octane is listed as 98 which I believe is equal to our 91.
Motor Method always reads lower than Research Method.
07-23-2007, 03:57 PM
#22
5th Gear Member
Join Date: Apr 2007
Location: The High Country
Posts: 3,547
RE: 85 octane???
Our GT goes up to 10,200' Leadville, Colo. everyday. I ran 85 oct in our 2004 Buick and it never pinged or had any other driveability issues. If you read in the owner's manual, it suggest NOT to burn 85 oct even if you live in a high altitude situation. I buy 87 oct. Shell gas here and it does fine. In fact, we just got back from a trip down to San Diego andI was wanting to see if the pep increased any at sea level. The verdict was..............I couldn't tell the difference in the seat of my pants. Ran like a scalded dog there as well as at 10,200'. So if you drive in Colorado and left your stang at home somewhere, you really missed out.
07-23-2007, 07:46 PM
#23
2nd Gear Member
Join Date: Nov 2006
Location: Manchester, UK
Posts: 346
RE: 85 octane???
ORIGINAL: ctrcbob
The higher the altitude, the lower octane you need. I travel to New Mexico often, and I use their 86 octane without any problems. Down here at lower altitude, I always use the 87 octane. (and this is on my Continental which calls for 91 octane).
As for the octane differences between the US (and Canada) and Europe/Australia, we here in the US use the average of the Research and Motor methods to get octane numbers. Ever notice on the pumps, it says "R+M/2"? Thats what it means. Because I drive in Europe, the lower octane numbers are 95 which I believe is equal to our 87 (R+M/2). Their high octane is listed as 98 which I believe is equal to our 91.
Motor Method always reads lower than Research Method.
The higher the altitude, the lower octane you need. I travel to New Mexico often, and I use their 86 octane without any problems. Down here at lower altitude, I always use the 87 octane. (and this is on my Continental which calls for 91 octane).
As for the octane differences between the US (and Canada) and Europe/Australia, we here in the US use the average of the Research and Motor methods to get octane numbers. Ever notice on the pumps, it says "R+M/2"? Thats what it means. Because I drive in Europe, the lower octane numbers are 95 which I believe is equal to our 87 (R+M/2). Their high octane is listed as 98 which I believe is equal to our 91.
Motor Method always reads lower than Research Method.
95RON = 91 Octane US.
99RON = 94 Octane US
And to who ever said buy a BMW....No thanks. Not my kind of car. There too common for me. BMW's are incredibly common here. So would rather not. Not to mention there dull cars. I want something that will make me smile and get attention. Something a car like an M3 just cant do there too subtle no one notices them when driving around. Not to mention they sound frigging awful.
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