Regular or Premium gas - Kawasaki KLR 650 Forum
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post #1 of 37 Old 05-14-2012, 02:23 PM Thread Starter
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Regular or Premium gas

I was reading a different post when a question of gas came up. I tried do a 'search' but didn't find anything that addressed the question i have.

What is better to run for the klr engine, regular or premium?

I've always tried to run premium because it was the only grade that did not have ethanol added, which i've heard can damage the rubber material components in the fuel system.
But, now i'm hearing that the engine will like me better if i run the lower octane Regular. What say you guys??
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post #2 of 37 Old 05-14-2012, 02:45 PM
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Nonsense, IMHO.

Higher octane than your compression requirement does no harm; lower octane requirement than your compression requirement . . . could be trouble (pinging/knocking/detonation/pre-ignition, etc.).

Unless your engine is "tuned" for the higher-octane fuel (e.g., spark advanced), no advantage may be realized from its use, but . . . don't hurt nothin'.
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post #3 of 37 Old 05-14-2012, 03:10 PM
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23,000 miles, and I've stuck nothing in it except the cheapest fuel at the pump..

No, premium doesn't hurt the engine.. But I'm a KLR owner.. We do things in a frugal manner.. (aka-cheap)
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post #4 of 37 Old 05-14-2012, 05:20 PM
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The higher octane really doesn't do anything for your KLR...HOWEVER, I think you may have a point in your favor if you can avoid ethanol. E-10 can do bad things to engines if left untreated in tanks for an extended period. OTOH, there are those who have burned nothing but E-10 for years, and report no problems at all. My experience has been different: I avoid ethanol whenever I can, even if it means paying for a higher octane than called for.
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post #5 of 37 Old 05-14-2012, 05:29 PM
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Regular or Premium Gas?

Good Afternoon All Wise and Nimble,

I will have to agree with LoneRider and basement on this one. My reasoning is simple. Over the past 10 years I have run all of my vehicles on Premium Gasoline. Name Brand Gasoline. I have a tour and charter company and put long ours and miles on all of the vehicles and it seems that there is less wear and tear on the engines, they run smoother and preform better.

Now, this could be a simple case of justification and good maintenance. But!... This is backed up by my mechanic. He is also of the same opinion and consistently tells me to run the high test. He has also told me that the life of the engine is defined by the cleanliness of the gasoline and the oil. It also helps to keep the maintenance cost down.


P.S. There is absolutely no scientific fact in the above statement. The slight possibility that I could have hold of a misguided truth remains possible. This is based on person experience and track record only. Please do not use this a s a platform on which to judge all other findings or place betts with.

Life is a ride that should be thouroughly enjoyed. ATGATT!

2007 KLR 650
Renthal Bars, Happy Trails Racks, SW Motech Crash Bars, Center Stand, Bash Plate, Yana Shinka HID headlight, Rigid LED Spots, Leo Vince X-3 Pipe, 20mm Ammo Can panniers, Cryca Brush Bars, GPS Ram Mount, Truck Air Horn, LED Brake Light Bar, Tool Tube, Done the "Do", Winner 2012 Mark B (4) Bolt award..
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post #6 of 37 Old 05-14-2012, 07:10 PM
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31k miles and still running strong on the cheapest stuff I can get out of the nozzle on the KLR. Now, I do have other bikes that require premium, and that's what they get. From the limited research I've done, the higher octane fuel has a lower energy density, and is more likely to leave behind engine deposits.

With the price difference between regular and premium, I would have enough money left over at 50MPG to do an extra oil change every 5000 miles.
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post #7 of 37 Old 05-14-2012, 08:40 PM
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I do regular unleaded here in Nebraska. E-10 is usually 10 cents cheaper, but unless it's at least 15 cents cheaper I'll go with the real stuff.

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post #8 of 37 Old 05-14-2012, 09:38 PM
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well i use only low octane in my klr. i'll try a tank of premium again, but i seem to remember more engine noise with higher octane, and i think it ran hotter. been a while though. i'm sure however you slice it - im paying way more for low grade than any of you pay for premium south of the border. $1.39 per litre right now for low grade. its BS i tell you!
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post #9 of 37 Old 05-14-2012, 09:46 PM
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I always run regular in my bike but last night i came into the station on reserve and decided to treat er to some premium and she is running bad. But im not sure it was the gas or i picked something up in the bottom of my tank since i ran it so low. I have half a bottle of heat gas line antifreeze/ water evaperator and ill see if that makes a difference. But either way it ran awesome on regular is is cheaper so i will probably go back to that.
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post #10 of 37 Old 05-14-2012, 10:00 PM
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17,550 still running garbage in mine. no problems, never put anything higher than 87 in....guess im too cheap.

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