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Mazda MX-5 Miata Fuel Questions

8 messages,  Last post on Jun 05, 2008 at 9:17 AM

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#2 of 8 Re: Gasoline octane requirements [dmorel] by aviboy97 Apr 11, 2007 (3:00 pm)
Replying to: dmorel (Apr 11, 2007 4:55 am) If you look closer, you will notice it say's "Premium is Recommended". Not required.   Expect performance and fuel economy to dip, but, I don't think it would be noticeable. Replies to this message: ateixeira (Jun 13, 2007 12:21 pm) wpavlik2 (Feb 13, 2008 9:44 am) ateixeira (Feb 13, 2008 1:48 pm) jimplogger (Jun 01, 2008 6:27 am)
#3 of 8 Re: Gasoline octane requirements [aviboy97] by ateixeira Jun 13, 2007 (12:21 pm)
Replying to: aviboy97 (Apr 11, 2007 3:00 pm) Are you sure about that?   I saw this PDF from Mazda:   http://www.miata.net/faq/brochures/2006/veh_specs_MX5.pdf   On page 11 it does say that under Recommended Fuel, but then it lists 91 octane again under Minimum Fuel Requirement.   Can you double-check with the techs there since you work in a dealership?   I will eventually replace my '93 with a newer one, and this is my "economy" commuter car. That would be a near deal-killer. Replies to this message: wpavlik2 (Feb 13, 2008 9:44 am) ateixeira (Feb 13, 2008 1:48 pm) jimplogger (Jun 01, 2008 6:27 am)
#4 of 8 '08 PRHT AT by wilzap Oct 16, 2007 (6:37 am)
Just put 89 octane in my last tank instead of 91 to see if I could notice a difference,used about3/4 tank when I refilled and got 30.3 per gal, didn't notice any difference in performance but most of the driving was done on country back roads and state roads, the tank before that I got 27.9 and both tanks I wasn't easy on it but also wasn't doing any real crazy driving or rally racing either,but I will probably use 91 most of the time
#5 of 8 Re: Gasoline octane requirements [ateixeira] by wpavlik2 Feb 13, 2008 (9:44 am)
Replying to: ateixeira (Jun 13, 2007 12:21 pm) I used to think that the "requirement" of Premium was a killer, until I did the math on how much more per tank we were really looking at. 4 bucks a tank? I'd bet that Midrange would be just fine (it's 89 in most places) unless you hear knocking and then Premium is the solution to that. Replies to this message: ateixeira (Feb 13, 2008 1:48 pm) jimplogger (Jun 01, 2008 6:27 am)
#6 of 8 Re: Gasoline octane requirements [wpavlik2] by ateixeira Feb 13, 2008 (1:48 pm)
Replying to: wpavlik2 (Feb 13, 2008 9:44 am) Good point...I'll live.   If you see a bargain 2006 used lemme know. I've seen them around $17k so far.   I would sell my 93 first but if it's a steal I might jump on it.
#7 of 8 Re: Gasoline octane requirements [wpavlik2] by jimplogger Jun 01, 2008 (6:27 am)
Replying to: wpavlik2 (Feb 13, 2008 9:44 am) My 2008 MX-5 has a 12.8 gallon tank. The diference in 89 and 91 octane where I live is ten cents per gallon. So the difference on a fill up is only $1.28 or $2.56 difference from 87 to 91. Performance is worth the small difference.
#8 of 8 Actual mileage experience? by makakio Jun 05, 2008 (9:17 am)
Looking at a Miata as a 25-mile commuter (mix city/highway). Currently drive an 03 BMW 325 averaging 24.5mpg and it's cherry, so I'd like to think about parking it and hanging onto it rather than continuing to add miles.   Regarding the Miata, I'd appreciate real-world mileage numbers from real-world enthusiasts. 5M or 6M please and if you tend to drive in a fairly hasty manner like me (and unlike, say, my father, who *averages* 29mpg in his Boxster), I'd appreciate that feedback.   Thanks.

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