Fuel Octane
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2,581 Posts
Vforce John tune requires premium due to advanced timing. 
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606 Posts
87 stock. There is no advantage to running higher octane.
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925 Posts
Ethanol free premium. At our altitude I think its 89 octane . The ethanol free is the part of the equation that I consider important. We run it in everything, plow truck , generators, pumps, saws, except my wife's Honda which doesn't give a crap. Been doing it for 8 plus years and zero issues with storage, or fuel systems. Before that it was a constant battle to keep fuel systems functioning and, or, carbs clean. The UTVS burn it with zero issues.
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117 Posts
Yep, me too. Ethanol free in lawn mower, truck, KRX. I believe the only thing ethanol is good for, is to attract moisture. Corn is for eating and making whiskey.
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925 Posts
Non ethanol keeps well also. We took 2 15 gallon year old tanks with us in a recent trip (ours here is 91, not the 89 I thought it was) and everything ran perfectly on it. I try to rotate what we keep on hand so there is never more than I year storage time. I have fed some forgotten about several year old non ethanol into our '79 plow truck with zero issues.
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117 Posts
I’m in Louisiana and we already have to cut through the humidity, it’s so thick. So the moisture builds up fast in fuel systems if you don’t use ethanol free gas. I used to have to fog my boat motor with SeaFoam but I don’t want to put any kind of additive in my KRX fuel. Probably best to stay ethanol free. Seems to run good and that’s all I’ve put in it.
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82 Posts
Cheap a$$ gas in mine. I ran MS109 and X85 fuels in cars that required it, where I was trying to eek out every tuning advantage I could. My stock KRX gets 87 octane, because that's all it needs to move forward and not blow itself to bits. A tune would change this sentiment.
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117 Posts
Probably how I should be too. Hell, if it sits so long the gas goes bad, I shouldn’t even have it, right?
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82 Posts
Amen brother.
I’m run 93 octane
And every gas tank I add Lucas cleaner...
been just a thing for me
And every gas tank I add Lucas cleaner...
been just a thing for me
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82 Posts
Side note, but I don't understand people's hesitancy with e10 gas. The engines aren't carburated. I suppose it makes sense for storing over winter and carburated engines like lawn mowers and some motorcycles, but I otherwise don't understand it. Not like it's going to degrade seals or anything at 10% max. No one worries about e10 gas in their car for the most part and we never hear of anyone saying "I went to the dealership and they told me the engine was done for after I put e10 pump gas in it." Am I missing something here?
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246 Posts
You pay over $13 a gallon? Or do you have a cheaper source?
I have a VP dealer in our town. I bought (2) 55 gal drums back in January for $480.00 ea . Not sure what the price is now . Side note .. Ive been running VP products for the last 25 years while driving Modified 4 cyls all the way to dirt late models . Maybe its a waste in the KRX but hey.. once you get addicted to racing fuel its hard to quit...
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93 Posts
That's still nearly $8.73/gallon
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