93 octane
#26
94 octane...
i live in NJ and the sunoco's here have ultra-94 octane and thats the only one i'll feed my baby with.. it's only 1 more octane... but costs like 9 cents more than 93 octane... but it's worth it cuz i feel better =P
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Originally Posted by jenkins-crew
higher octane is better performance.
Unless you are running non-stock timing or other modifications, running higher octane will not yield more performance, it will only hinder it. Until you do ignition and timing modifications or some kind of forced induction, it is best to stick with what is advised by Mazda.
I know for non-turbo earlier model rx7's you wanted to run the lowest possible octane of gas you could get.
Also remember, higher octane will cause more carbon buildup which is not a rotary's friend. Only run higher than suggested octane if you need to.
EDIT:
Since I haven't had a chance to actually look in my manual yet because I haven't even taken delivery of my rx8, what IS the recommended octane for the rx8?
Last edited by ddub; 02-22-2005 at 05:19 PM.
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Originally Posted by dDuB
...what IS the recommended octane for the rx8?
"Your Mazda will perform best with fuel listed in the table."
Table contains:
"Premium unleaded fuel | 91 [ (R+M)/2 method] or above (96 RON or above). "
Then under table:
"You may use a regular unleaded fuel with Octane Rating from 87 to 90 (91 to 95 RON) but this will slightly reduce performance. Fuel with a rating lower than 87 octane (91 RON) could cause the emission control system to lose effectiveness. It could also cause engine knocking and serious engine damage."
I've opted for the slightly reduced performance.
Last edited by rx8cited; 02-22-2005 at 08:27 PM.
#29
Need to figure the math, if I use one tank a week, $0.20 difference in 87 vs 91, hmm, $3.00/week. Think for the performance will stick with higher grade. Hell cut out one of those starbucks coffees a week
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Originally Posted by dDuB
Since when?
Unless you are running non-stock timing or other modifications, running higher octane will not yield more performance, it will only hinder it. Until you do ignition and timing modifications or some kind of forced induction, it is best to stick with what is advised by Mazda.
I know for non-turbo earlier model rx7's you wanted to run the lowest possible octane of gas you could get.
EDIT:
Since I haven't had a chance to actually look in my manual yet because I haven't even taken delivery of my rx8, what IS the recommended octane for the rx8?
Unless you are running non-stock timing or other modifications, running higher octane will not yield more performance, it will only hinder it. Until you do ignition and timing modifications or some kind of forced induction, it is best to stick with what is advised by Mazda.
I know for non-turbo earlier model rx7's you wanted to run the lowest possible octane of gas you could get.
EDIT:
Since I haven't had a chance to actually look in my manual yet because I haven't even taken delivery of my rx8, what IS the recommended octane for the rx8?
#31
So the owner's manual is wrong?
Originally Posted by dDuB
Since when?
Unless you are running non-stock timing or other modifications, running higher octane will not yield more performance, it will only hinder it. Until you do ignition and timing modifications or some kind of forced induction, it is best to stick with what is advised by Mazda.
I know for non-turbo earlier model rx7's you wanted to run the lowest possible octane of gas you could get.
Also remember, higher octane will cause more carbon buildup which is not a rotary's friend. Only run higher than suggested octane if you need to.
EDIT:
Since I haven't had a chance to actually look in my manual yet because I haven't even taken delivery of my rx8, what IS the recommended octane for the rx8?
Unless you are running non-stock timing or other modifications, running higher octane will not yield more performance, it will only hinder it. Until you do ignition and timing modifications or some kind of forced induction, it is best to stick with what is advised by Mazda.
I know for non-turbo earlier model rx7's you wanted to run the lowest possible octane of gas you could get.
Also remember, higher octane will cause more carbon buildup which is not a rotary's friend. Only run higher than suggested octane if you need to.
EDIT:
Since I haven't had a chance to actually look in my manual yet because I haven't even taken delivery of my rx8, what IS the recommended octane for the rx8?
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Originally Posted by jenkins-crew
So the owner's manual is wrong?
Now if the rx8 was meant for 91 octane, then use 91. But don't expect that if you fill up with like 110 or 115 at the dragstrip to suddenly drop your times a ton.
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Did you even read my full post? I said
So if suggested is 91, 93, whatever, run it and be happy. But you will not yield more power from like 110 or 115, etc, at the drag strip on a stock car.
You were saying higher = more performance, that is wrong past what Mazda suggests. Why would higher octane just automatically make your cars performance increase when completely stock?
Now if you consider performance as fuel economy or engine wear, once again higher isn't better past what mazda suggests on a completely stock car. Higher octane, when not needed, will just cause more carbon buildup and worse fuel economy.
it is best to stick with what is advised by Mazda
You were saying higher = more performance, that is wrong past what Mazda suggests. Why would higher octane just automatically make your cars performance increase when completely stock?
Now if you consider performance as fuel economy or engine wear, once again higher isn't better past what mazda suggests on a completely stock car. Higher octane, when not needed, will just cause more carbon buildup and worse fuel economy.
Last edited by ddub; 02-23-2005 at 12:05 AM.
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