Octane
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RE: Octane - 5/9/2008 8:49:52 PM
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xxxmaxximusxxx
Posts: 59
Joined: 4/23/2007
Status: offline
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you'll get as many opinions as people who answer. i'm pragmatic.... the manual says 91/93 premium, so i have been and do for now. but however, i've thought about trying 87 or 89 just to see how it would run, and i've seen forums where guys say 87 and 89 will run just as well as 91 or 93. then i thought about it differently... i usually fill up at about 10 gallons at a time at todays local prices 3.89/regular....3.99/ midrange.... and 4.09/ premium, so the price spread for me is $38.90 to $40.90, 2 dollars times 1 fill up a week or 10 days, $2 dollars every week and a half. that's not even chump change, little more than the price of a cup of coffee. so right now it's not worth it to me to experiment with my own RX, but i'd like to on someone else's if you're willing. :) if the gas prices continue towards $5.00 or $7.00 as i've seen suggested, then i may think harder about at least alternating between 89 and 91 once in awhile, but not 2 or more tanks of regular in a row. i saw, but can't find it again, a comment in a forum that said some RX race drivers use regular grade because it gives better mileage, so fewer pit stops, but they rebuild their engines after ever race. i take that increased mileage claim with a grain of salt. i also remember when gas cost .20/.25 cents a gallon in 1962 and my two 4 barrel carbs. 389 Bonneville HD got 19 miles per gal.
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< Message edited by xxxmaxximusxxx -- 5/9/2008 9:12:38 PM >
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RE: Octane - 5/10/2008 1:01:54 PM
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8xdaily
Posts: 7
Joined: 4/26/2008
Status: offline
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im a 20yr old college kid with a 04 6spd rx8 and ive been using 87 or just regular gas and ive seen no difference in the cars performance. i used to use premium gas but when the prices started getting up there i switched and honestly i think the rx8s can run on regular but still once in a while or every couple fill ups ill use premium
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Printable Version
I have an '05 RX 8 6 speed...Like everyone else, mpg are not quite cool...about as good as a Ferrari 
Question....What will 89 Octane gas do to an RX8 over the long haul? I just couldn't find an answer on any of the forums and I know it must be out there. 
