regular gas in 919 - Wrist Twisters
 
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post #1 of 20 Old 04-23-2013, 06:13 PM Thread Starter
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regular gas in 919

Hi, I'm getting ready to do a long road trip and a little math tells me that I'm going to need to buy about 175 gallons of gas along the way. I always run premium gas in my bike but stand to save quite a bit of cash by running regular. I wouldn't think this would be of any detriment but would like a second opinion. Thanks!

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post #2 of 20 Old 04-23-2013, 06:17 PM
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If you're not running 87, you're missing out on savings. The only thing to be had with premium is more exhaust stink, there's no advantage or performance gain. The compression is not high enough to warrant a 91 or 92 octane. Even on track days in the summertime at 80*.

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post #3 of 20 Old 04-23-2013, 06:19 PM
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I haven't had any trouble running regular gas, but I err on the side of caution. However, if you talk to most car dealers (my wife has an Audi), they say with modern engines it doesn't make that much of a difference. But that's with cars; there are definitely more knowledgeable members on this site who have longer experience with their 9'ers than I do, and I haven't done a long road trip yet with mine. I would be interested in hearing opinions/ideas from those people as well....

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post #4 of 20 Old 04-23-2013, 06:20 PM Thread Starter
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Awesome. Regular it is.

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post #5 of 20 Old 04-23-2013, 06:48 PM
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87 all day long for me. No need OR benefit for higher octane.

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post #6 of 20 Old 04-23-2013, 07:03 PM
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I have tried premium, but it runs the same on regular.

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post #7 of 20 Old 04-23-2013, 07:13 PM
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No differences in octane so save yourself some cash and buy regular.

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post #8 of 20 Old 04-23-2013, 09:29 PM
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Quote:
Originally Posted by Devin4242 View Post
I haven't had any trouble running regular gas, but I err on the side of caution. However, if you talk to most car dealers (my wife has an Audi), they say with modern engines it doesn't make that much of a difference. But that's with cars; there are definitely more knowledgeable members on this site who have longer experience with their 9'ers than I do, and I haven't done a long road trip yet with mine. I would be interested in hearing opinions/ideas from those people as well....
No offense, but the person who told you that is a load of crap...

Octane has to do with detonation. Some engines are designed for higher compression (including turbos/superchargers), which require higher octane to reduce predetonation. If an engine calls for 87 octane, there is never a need to run a higher octane unless you're in hot climates and your engine is pinging. That would be a good time to step up to the next octane level so you don't destroy your engine.

There's quite a few threads on here that's already covered the topic by those far more knowledgeable than I, it would be worth your time to read them.

The 919 calls for 87, and I found that it runs best on 87. Best response, best fuel mileage, and least amount of stink, all around. There's no need or reason to run a higher octane unless the 919 engine is pinging.

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post #9 of 20 Old 04-23-2013, 11:50 PM
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i have ran the 919 in 105*F ambient temps, running the PISS out of it on the snake (so much to where the fan was always on) on 87 octane and never had a problem.... like everyone stated, run 87 the bike just does not call for any more than it.

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post #10 of 20 Old 04-24-2013, 08:10 PM
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You think my viffer needs premium? I've run both and noticed no difference.

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post #11 of 20 Old 04-24-2013, 09:42 PM
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I thought VTEC engines required premium? And if not, recommended to maximize the effect of the variable timing. Not sure on motos but if you use cheap gas on cars requiring premium and it senses engine knock, it will retard timing causing your engine to be less efficient.

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post #12 of 20 Old 04-24-2013, 10:03 PM
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Put 87 in mine for the first time today and no difference from premium. Just cost me a less.

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post #13 of 20 Old 04-25-2013, 02:56 PM
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The only reason to run higher octane fuel is if you have done engine mods that have raised the compression ratio. If not then you have no reason to do otherwise.....

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post #14 of 20 Old 04-27-2013, 11:14 AM
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This is new knowledge to me also. I hope it helps with the stink some. I've been running V-Power 93

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post #15 of 20 Old 04-27-2013, 11:28 AM
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Yeah guys, I am not trying to force anyone to believe it but there has been plenty of info produced with just a google search but the function of octane rating is to help control spark or knock in an engine. The higher your compression ratio the more prone the engine is to pre-detonation, therefore you have to run higher octane to prevent it. Running higher octane is a by-product of a higher compression engine, which by proxy generates more power than an engine with lower compression. The octane rating itself is not going to increase the power on it's own. If you search through the forums here just by using the word octane I know I have posted some info that will point out the facts as they are. I'm not saying 93 will hurt or anything like that, and I know some companies advertise different blends in their gas but generally speaking if your manual says run 87 or 89 and you have not done any serious engine mods you will be far better running that rating and then throwing something in the tank to treat the fuel system on occasions as specified.


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post #16 of 20 Old 05-05-2013, 09:26 PM
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RE:

42,000 miles on 87/ no problems.

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post #17 of 20 Old 05-13-2013, 08:38 PM
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I had no idea until now that the 919 ran on regular... I've been using Premium for over a year since I thought most Japanese/higher revving bikes more or less required it...

I shouldn't have an issue switching to 87 after running 93 for over a year should I?

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post #18 of 20 Old 05-13-2013, 08:48 PM
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Quote:
Originally Posted by 8Biker6 View Post
I had no idea until now that the 919 ran on regular... I've been using Premium for over a year since I thought most Japanese/higher revving bikes more or less required it...

I shouldn't have an issue switching to 87 after running 93 for over a year should I?
Yes you will. It's called more money in your pocket!!

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post #19 of 20 Old 05-13-2013, 09:05 PM
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Run 93 if you like a stronger stink.
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post #20 of 20 Old 05-13-2013, 09:21 PM
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No, no issues, its not like your engine has taste buds.....

if you want finnicky eaters get a cat

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