I use 89 with 10% ethenol

 

i was told at the dealer to put 87 in the tcat, and i did that for a while,

then one day i filled it up with 89. and it felt better, and smoother, been doing that ever since.

 

I once ran my 06 650 V-2 with about 3 gallons 114octain race fuel with amsoil mixed in for the sled, I only had about half a gallon of regular 87 mixed in, It ran good, seemed faster, and it had the awesome smell, but the pipe was a lot hotter and it prety much burned your leg if you rode it to long but it was fun.

 

just reg ol 87 with seafoam. ive used super before but never felt any different than with 87 octane so i stick with the cheap stuff.

 

i run 87 because that is what is always in my gas cans and it is also cheapest (price is critical because i agreed w/ my mom that if she'd buy the atv i have to pay for gas and half of the service costs each time it is in the shop)

 

the bikes are timed to run 87, if you want to run high octane you have to change your timing. the higher the octane the slower it burns

 

I run as high as I can get at the station
I also changed the timing with the dynatek cdi and increased the compression with the big bore kit so i need highter than 90
i try to only use 93 from holiday

 

87 here & seafoam every 5th tank.

you changed your name???

 

The marine fuel I buy is 92 octane. 5 cents cheaper per liter than regular 87. I might fill a jerry can with 94 if I am filling my truck up on occasion.

 

suppose to 87 octane but more like 80% gas and 20 % water. Also it don't run worth a damn. Now will dump all cans in clear jug before using, checking for water. Some stations don't check their tanks for water. Hoot

 

If your quad is stock motor compression wise running higher then 87oct does no good and can hurt preformance because the higher octane fuel burns slower and like was said the timeing is not set for it,Some of these motors are on the low side for compression anyway.

I voted 89 i have been using it because it has 10% ethenol in it.

 

The cheapest I can find..................... urpaw: urpaw: urpaw: urpaw: :beerchug:

 

I voted 89 as it's cheaper around here. Has 10% ethanol. If 87 were cheaper I'd run it. I've run both in it and it doesn't seem to care, and I can't tell any difference.

 

My friend just had an issue over the weekend with his Eiger. It popped and carried on all day on our ride, and just wouldn't idle smoothly. He found in his owners manual that Suzuki remends no more than 6% ethanol fuel. The station he got his gas from sell 10% ethanol mix. He drained the tank, filled it with midgrade from Shell and now it runs fine. Could there have been water in his tank? Maybe, I don't know. I throw this out because the Eiger engine is a 400 in the same family as some Cat 300, 400 and 500 engines.

 

ethanol can make the motor run leaner, it proably would have been fine if he had adjust his pilot fuel screw.

 

I will usually use 89 in my '08 700h1 and it seems to work well.

However, I find more times than not to not have any on hand when I need it, so considering I have 2 drums of custom blended 101 octane in garage for my chevelle I'll use that in a pinch. Won't chance it in the winter months but it works great in the hot weather. And I especially like (to my fellow riders anoyance) the grape scent additive I have in it, lol !!

 

All things being equal, you get no more performance out of 92 vs. 87. Like Yooper said he has made timing and compression changes so he needs to run 90 plus to prevent knocking.

Ethanol is 105-110 octane. So when it's added to 87 (10%) it bumps the octane rating up to 89.

The Ethanol in the gas probably mixed with water in the tank of the Eiger and caused the poor running condition. When you run ethanol all the time it's not a problem.

I buy mid grade most of the time. 89-90 octane. The reason is gas will lose octane when stored and I don't burn through tanks of gas very often. Sometimes months between fill ups.

 

I use off-road diesel, but in the other bikes I try to put 92 in them, but usually end up using the cheap stuff. Around here that is 89 with 10% ethanol.

 

I alternate with the V2.. One tank will be 87 - 89 Octane, and then when that gets to abt 1/2 tank I'll top it off w/ 92 Octane, and then when that gets to abt 1/2 I top it off with 87 - 89, and so on, etc....
I know that too much octane will only cause carbon build up unless it's a high compression ratio engine then high octane is a must to prevent detonation.
My Cat seems happy with the routine I use, and it's got over 1300 miles.

 

I run 87 in the TCat. That was my dealers recommendation. I asked about buying 92 octane from Chevron and he said I would be wasting money. I don't know much about it but the quad works fine on 87.

 

Higher Octane burns slower then less octane regular fuel. Not better, Not faster, and not with any extra power, just slower. Unless the engine is setup for higher compression and increased ignition timing there is rarely any benefit to burning higher octane fuels. The reason many engines require high octane is only because with regular they would be prone to pre-ignition. In most engines, designed for regular, using high octane results in less performance, because the fuel is not finished burning by the time the exhaust valve is opened and it will develop less power.

 

That's absolutely right Wyo Ive always called pre-ignition detenation, or predet, but either way youve explained it perfectly! In the 20+ years I was a tech / troubleshooter Ive had to explain the Octane issue hundreds of times to customers that were mis-informed. It wouldve been nice to have you on my team. thumbguy

 

why is 87 more expensive than 89 or 93 up north. down south 87 is the cheapest, found it for 1.42 today.

 

No Ethonal...just plain gas..87% octoane..seems to run great. Also run seafoam about every other fill up. Seafoam when parked for more than 2 weeks. thumbguy

 

What is seafoam? What does it do?
Up north here 87 is $1.89. In the summer it was over 4 bucks!
I run 87. I never believed in that higher octane crap. Its a waste of money.