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Author Topic: More Fun with Fuel....  (Read 586 times)

Offline sgarnett

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Re: More Fun with Fuel....
« Reply #25 on: September 11, 2017, 11:03:21 AM »
I think you've hit the nail on the head, DD!  :gavel:

Offline Larry Fine

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Re: More Fun with Fuel....
« Reply #26 on: September 11, 2017, 02:29:44 PM »
I would think that the higher octane rating (slower rate of burn) would lead to more exhaust popping, rather than less.  With a slower rate of burn, all other things equal in the motor, one would think that the possibility of some unburnt air/fuel getting past the open exhaust valve on the exhaust stroke, where it would be ignited with the hot exhaust.

Read my comment again; I did say that I observed less popping when using the lower octane.

Offline Larry Fine

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Re: More Fun with Fuel....
« Reply #27 on: September 11, 2017, 02:36:51 PM »
I did find it interesting that Larry Fine has the same year bike (96), was using super and went to regular and discovered he's been wasting money because his bike runs as well or better on regular.

I expect, at some point, to revert to the premium again to see if there is a discernible difference when going in that direction.
Quote
While octane is measured, there can be a huge difference in nearly every other aspect of a given fuel's ingredients.

That's why I changed octane but stayed with the same brand.
Quote
In my case, I am convinced that it has a lot to do with ethanol, or that the super I'm using doesn't contain it, where the regular did...

Here, at least, all grades contain the same 10% ethanol content.

Offline DesertDragon

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Re: More Fun with Fuel....
« Reply #28 on: September 12, 2017, 09:47:43 AM »
I think you've hit the nail on the head, DD!  :gavel:
Thank You Mr. sg... 
Sometimes it doesn't hurt to state the obvious...
Unless you ARE the nail...
claugh1
For Mr. Fine... "I expect, at some point, to revert to the premium again to see if there is a discernible difference when going in that direction.."
I will do the same and revert back to regular and see if I notice a difference going that way.
Keep the Rubber on the Bottom!

DD

Offline Larry Fine

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Re: More Fun with Fuel....
« Reply #29 on: September 12, 2017, 07:29:23 PM »
Unless you ARE the nail...

"I'd rather be a hammer than a nail . . . " ~ Simon and Garfunkel

Offline Wahrsuul

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Re: More Fun with Fuel....
« Reply #30 on: September 13, 2017, 05:26:49 AM »
Whenever I get a "new" vehicle (way too often when it comes to bikes), I try out all the fuels.  I try to run 4-5 tanks of each, and see how it runs and if there's any difference in mpg.  Then I go with what works best.  My Mazda gained .5 mpg with mid, nothing with super, so I went back to regular.  My old Dakota OTH, much preferred mid.  About a 1.5 mpg gain, and it ran much smoother.  The wife's Edge doesn't seem to care, and so far I've only run a single tank through the Ram.

My 96 NH (bless her) ran on pretty much anything from super to the unknown brand at gas stations in tiny towns on country back roads.  Never a complaint.  The ST13, runs on premium, 91 or better.  The Voyager seems to like ATV gas - sold around here at one place - the kind with no ethanol.  But she'll run on anything as well.  As soon as the ST is back on her...wheels, the search begins for a replacement.

Offline DesertDragon

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Re: More Fun with Fuel....
« Reply #31 on: September 14, 2017, 09:33:10 AM »
Once again I got a nice surprise on filling up with super yesterday - My last tank netted 53 mpg...
Amazing to me, as was I expected a significant drop because I was stuck in a huge semi-truck traffic jam on the interstate.
At this point, after 5 tanks, an error related to fill differences is very unlikely, not that I thought it was a contributing factor in the first place...

Since my switch to super I have yet to get less than 50 mpg, when previously 45 was the best I did (nothing to sneeze at either IMHO).
The bike continues to run great, so I'm a happy camper...

If it hadn't been for Rubo, and his "Placebo or Real? 87 or 92 octane" thread, I probably would have never tried super gas.

So, Rubo - Thanks for the "hot tip" - For me the fuel change has been great. 
My scooter is running better than ever and the modest increase in fuel cost is actually saving me money in increased mileage.

BTW - It turns out I have been using Mobil Synergy premium all along - It took the station awhile to post their stickers on the pumps....
 
Keep the Rubber on the Bottom!

DD

Offline hppants

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Re: More Fun with Fuel....
« Reply #32 on: September 14, 2017, 10:49:08 AM »
DD - that is great.  If I got your results, I'd run Unicorn Gravy through my bike.  When I had a '96 750, I would usually get 45-47 mpg, on RARE occasion, 49-50 (55 mph stroll through the back country).

Where are you located?  If high altitude, was your bike re-jetted for that?

Offline DesertDragon

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Re: More Fun with Fuel....
« Reply #33 on: September 14, 2017, 04:42:39 PM »
DD - that is great.  If I got your results, I'd run Unicorn Gravy through my bike.  When I had a '96 750, I would usually get 45-47 mpg, on RARE occasion, 49-50 (55 mph stroll through the back country).
Where are you located?  If high altitude, was your bike re-jetted for that?
Unicorn Gravy retailers must be regional...
 yaaaah3
I'm not far from the Grand Canyon ~ a mile up.  Was never rejetted by me - prior owner was in Phoenix, AZ.
Based on my last look at my plugs, the bike was happy with the jetting it had (a nice even realtor approved light brown ;)
I'll check them again before too long to see what difference the super is making, but based on the mpg performance, it can't be too far to the rich side, or my mpgs would be worse, rather than better...

As to why it's running so well.... I can't explain it either.
Keep the Rubber on the Bottom!

DD

 

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