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-   -   Increase MPG avg. 2.9 (http://www.fuelly.com/forums/f31/increase-mpg-avg-2-9-a-14903.html)

JBW 12-30-2013 03:52 PM

Increase MPG avg. 2.9
i did a MPG octane compar-o, over 3,000 miles. as per 87 vs 89 vs 91-94 octane. i averaged 2.9 more mpg using regular automotive grade fuel with the highest AKI rating vs the lowest.

Jay2TheRescue 12-30-2013 04:03 PM

Its very dependent on the vehicle. Vehicles with specially tuned, high compression engines (motorcycles, sportscars) will do better on high octane. Most others will get better mileage on low octane. The only other factor to consider is that in some areas the premium fuel is ethanol free, and the regular octane is an ethanol blend.

RobertV 12-30-2013 10:51 PM

Not 100% sure with bikes, but with most vehicles, filling up with a higher octane than your vehicle's tune asks for is just wasting money.

Jay2TheRescue 12-31-2013 09:12 AM

I believe most, if not all motorcycles require premium fuel.

JBW 01-30-2014 02:12 PM


Originally Posted by Jay2TheRescue (Post 173501)
in some areas the premium fuel is ethanol free, and the regular octane is an ethanol blend.

i use the highest AKI rated fuel and a ethanol treatment. the ethanol treatment helps a little on the avg. mpg. by 1.5 mpg.

toller 02-09-2015 07:22 AM

My 2007 Ninja 650r (twin) has an 87 octane minimum recommendation.

Jcp385 02-09-2015 08:31 AM

Sportsters called for 87...until they put EFI on em. 91+ is req'd now. Blah.

shakennstirred 04-11-2015 03:09 AM

to many different grades you have there.
we have 95 and 99 and some sell 98

andyrobo 04-11-2015 05:15 AM

Octane stuff is kind of cool. This is the best article I found that describes what Octane does:
Octane Ratings

So octane needs depend on the compression of the engine. It looks like your bike has a fairly high Compression Ratio of 11.3:1
Total Motorcycle Website - 2005 Suzuki DL1000 V-Strom 1000

This would suggest that even though your bike has proven to run on lower Octane, as you pointed out, you will indeed see better performance with higher octane because your engine design (compression) is high enough to take advantage of a higher octane.

One thing to consider is the performance increase vs the cost increase. If the fuel economy increase is 5% but the cost of higher octane is 8% then maybe it's not as economical (of course better fuel economy is kinder to the planet and higher octane might perform better).

Jay2TheRescue 04-11-2015 06:29 AM

My 06 Super Glide requires premium.

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