TheWhiteLotus
ArboristSite Member
Lone wolf, everything here in Reno/Carson City is 87 although theres one place in Reno that has 110. Gardnerville is only about 15 mins away and they have 91 Efree so maybe ill just grab a gallon or two of that!
None here maybe an airport.Lone wolf, everything here in Reno/Carson City is 87 although theres one place in Reno that has 110. Gardnerville is only about 15 mins away and they have 89 Efree so maybe ill just grab a gallon or two of that!
Lone wolf, everything here in Reno/Carson City is 87 although theres one place in Reno that has 110. Gardnerville is only about 15 mins away and they have 91 Efree so maybe ill just grab a gallon or two of that!
That's where I go... Walmart gardnerville. I Get 10 gallons at a time.
RupeDoggy I was just talking to him about a 200TWARNING OFF TOPIC ALERT
Dayum, two more guys from the Reno/Carson City area, either of you know Mike, "Rupedog", he is out in Dayton.
I help out another account in Reno, every so often, and met Mike for Dinner at Red's Old 395 BBQ, in Carson, trip before last.
Looks like I will be going back in May when Tom goes on vacation, we might have to have a little GTG, don't know what the hotel will think of me bringing chainsaws, but Medford didn't get at all concerned last June, just kept them cased in the room.
Doug
End Off Topic Alert, now back to your regularly scheduled discussion
RupeDoggy I was just talking to him about a 200T
You get the gas at the walmart? I was going to head down there this weekend. Do you cut firewood here in Carson/Tahoe? Been lookin for a wood cutting buddy...been just buying bulk almond and cutting it up in my backyard as of late. Hoping to get some permits for pine once it warms up!That's where I go... Walmart gardnerville. I Get 10 gallons at a time.
I was taught in training it's 4% for every 1K in elevation but wherever your info came from may use 3%. I'm a service tech and have to D rate for burners and those are the numbers we are taught to use (not saying your numbers are wrong just saying this is what I was trained to use). So by my numbers at 5K you would be looking at 20% loss. Higher oct gas is a slower burning (kind of like a magnum powder if you reload), just for the heck of it I tried 91 oct E-free and 88 oct E-free and maybe it's my imagination but it didn't seem as much heat was coming off my engines at 7K elev with the 88 oct and I couldn't notice any difference in power, which mind you using my numbers I have already lost 28% as compared to sea level at 7K. I mix at 40:1. Now this is on stock saws, this year will be my first year using a higher compression saw so I will have to see what happens.Just a thought now that I know your elevation 'there' ..I don't know the elevation you cut at though? There may be good reason why they choose to stock low octane fuels there. (To me, that's not heard or seen of).
You roughly loose 3% compression for every 1000 ft.
I believe 5000ft is at 86%
So you could be at 129 psi if say your saw would be at 150 at sea level.
That's not good for high octane at all.
That creates pre ignition?
Have you actually seen a difference using Stabil?
E-free will STILL go BAD over time! The only "gas" that is safe to leave in your O-P-E is an alkylated fuel (not really gas) like Moto-Mix or True-Fuel.Im not one to judge a book by its cover but im assuming the gas attendants won't know. I was Only curious about ethanol free because i was hoping to use that and leave it in my blowers, trimmers, saws without draining the tanks when done using. Im assuming if the button data 87 that means it's 87 octane...im kinda new to all this!
Thanks!
You get the gas at the walmart? I was going to head down there this weekend. Do you cut firewood here in Carson/Tahoe? Been lookin for a wood cutting buddy...been just buying bulk almond and cutting it up in my backyard as of late. Hoping to get some permits for pine once it warms up!
Hey everyone! Locally here I can get Ethanol free gas that appears to have an octane of 87 (the button says 87). Im curious if this is better than the normal premium gas i typically use. I am an occasional use firewood cutter so im not using my saws everyday, maybe just once a week. Is the ethanol free a better option? Ive read that Stihl recommends at least 89 octane so i was hesitant to get the ethanol free.
Yeah sorry. I edited just Pryor to your quote & post after reading of @lone wolf link. I went back to what I had read in the past and revisited it...coped over belowI was taught in training it's 4% for every 1K in elevation but wherever your info came from may use 3%. I'm a service tech and have to D rate for burners and those are the numbers we are taught to use. So by my numbers at 5K you would be looking at 20% loss. Higher oct gas is a slower burning (kind of like a magnum powder if you reload), just for the heck of it I tried 91 oct E-free and 88 oct E-free and maybe it's my imagination but it didn't seem as much heat was coming off my engines at 7K elev with the 88 oct and I couldn't notice any difference in power. I mix at 40:1. Now this is on stock saws, this year will be my first year using a higher compression saw so I will have to see what happens.
Cut and paste from web search:Because higher octane gas burns slower, it is more resistant to knock when subjected to higher RPM and cylinder pressures. ... Higher ratios cause higher cylinder pressures and therefore cause the engine to be more susceptible to pre-detonation or knock.
something to be said about matching compression with octane. Not sure about the heat thing? I do generally run 89 with my ported saws and have tried octane bust a few times with camp gas. Meh...same ol'.just for the heck of it I tried 91 oct E-free and 88 oct E-free and maybe it's my imagination but it didn't seem as much heat was coming off my engines at 7K elev with the 88 oct and I couldn't notice any difference in power.
Then there is that Winter gas thing! Google that.Yeah sorry. I edited just Pryor to your quote & post after reading of @lone wolf link. I went back to what I had read in the past and revisited it...coped over below
"Lower octane gasoline like "regular" 87-octane gasoline can handle the least amount of compression before igniting. ... A "high-performance engine" has a higher compression ratio and requires higher-octane fuel to prevent it from prematurely igniting fuel before the spark plug does it".
I think diesel & jet fuel (jet A, jet B kerosene base) with low octane. Air has to be compressed to the nuts in turbines and fuel sprinkled on top BUT it needs a hot ignition. but not so bad when it vapours May have got me thinking down the wrong path as:
Flash points, autoignition volatility, burning temp, octane, blends and grades are all different and all make for interesting topics?
Further thinking I had in my mind that lower octane is fine for low compression (which it is) then putting 2&2 together with the low octane fuel in his area with the elevation. I think that all holds true too. I believe lone wolfs link said you make them match accordingly. I certainly got confused/ wrong when writing high octane causes pre ignition. My apologies to all.
It makes sense from my limited experience with that of what you say, which being higher octane burns slower. I bought a new 262 xp in summer of '92. I had been running 266 for Tree Thinning in BC. This was just months before Canada went to unleaded in '93.
Anyway,, It was the first saw we had heard of that was said to run the 92 octane. I ran contractors camp gas (87) Then I picked up my own job in the fall then tried the 92 octane at some point. Turned out 8 tanks equalled 5 tanks. That screwed me up because tanks were my clock as well my food bell after 2-3 tanks.
It would have cost less money by a fair bit in large quantities but never used it since? Not sure how that works with unleaded the same? Would it be 5/8 still be the difference? E10 is supposed to promise 2-3 miles less per gallon? It supposedly runs 40f cooler than e free going on recent memory with those numbers? I guess depends where you read. I have read links with opposite argument too in terms as engines running hotter?
Fuel is so much more entertaining to discuss in depth than mix oil and ratios?
...BUT it's never discussed in detail.
That's simply because it's a lot more in depth. When it's oil... "opinions are like azzholes..everybody has one"
something to be said about matching compression with octane. Not sure about the heat thing? I do generally run 89 with my ported saws and have tried octane bust a few times with camp gas. Meh...same ol'.
So my understanding with compression at altitude will differ with atmosphere pressure. So if a brand of saw was consistently 150psi at sea level at a certain 'pressure' then that needs to be matched with the pressure at altitude. I personally have never done it. I have also heard 3.5% and you say 4%.
False reading can change at 1% they say. Technology it my be 4%?
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