Even if the motor fails you can still glide in for a landing.....
Two-Stroke Oils: All the Same?
- Thread starter Paul Bunions
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Problem is the choice is narrowed as to where you can land.
I just can't fathom this. Zero reason to play the "how close to running my engine without oil can I get?" game. It's like going to the desert and trying to live on as little water as possible, or draining 3 quarts of oil out of your car's engine, and driving around on the remaining 2 quarts. More oil seals rings better, makes more power, lubes better, cools better, and good oil even runs cleaner, due to more detergents being present in the greater amount of oil. Just absolutely zero reason to even attempt this.
If I took my equipment to a shop, and they put 100:1 mix in it, harsh words would be spoken, and they would never see a single penny of my money ever again.
Roger that, that's one of the reasons he cant get me to do it. If my daughter was bigger she would be all about it. My FIL is doing something so he can fly double and take her with him next sumer. Something about a cart and some classes.
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thenne1713
ArboristSite Guru
Were you re-tuning with each change in MIX ratio? It is required
I’m not really convinced about the necessity to tune if you change mix, so long as it’s not drastic like going from 100:1 to 16:1.
I doubt there will be any change required between 40:1 / 50:1 / 32:1.
Happy to be proven wrong.
I've had to re-tune going from 40:1 to 50:1, and back again. When I was running Tru-fuel, I got one can of 50:1 somehow. I should have just dumped that can in the truck and not run it in the saw at all.
Hmm were you going from pump gas to tru fuel? That’ll require tuning, but I’d be surprised if the same gas just different mix ratio by 1% would require it. I’ll test and video my findings tomorrow and report back.
Your changing the amount of fuel that gies into the engine, even if marginally, why wouldn't you tune for it? Does that +or- not matter to you? You like testing things go grab your tach and see the changes. Heck a 15* temp swing makes a noticeable difference adding or taking away fuel via oil displacement will make a difference as well.
That's funny I just posted foe you to do that lol!
Haha yeah I’ll try it for myself and share the video here. I have a weed eater that I’ve just finished so i’ll have a play around tomorrow.
The Shooters Apprentice
Addicted to ArboristSite
I’ve always run it 48:1 so that’s what my saws are tuned for. Been running it for years now.
The Shooters Apprentice
Addicted to ArboristSite
When I was a kid I always observed my old old man tuning his saws constantly, and since I didn’t do that with my Husky I got the notion in my head that Stihl carburetors we’re junk.
Now at 29 years of age, it doesn’t matter what saw I run, if it’s more then a couple cuts I find myself tuning it to get the most out of it.
Running 40:1 Trufuel, refueled with the one can of 50:1, saw went super lean. Retuned for 50:1, used it up, went back to 40:1, had to retune again. All happened within an hour, same place, same altitude, same temp, same humidity, both Trufuel, just 50:1 vs 40:1.
As I've said plenty of times, tune for what you're running. We battle on the forum about 11/164ths of a percent of a drop of oil difference, or dino vs. semi vs. syn, Jaso FB vs Jaso FD vs marine oil, but tuning makes a bigger difference than any of it. I'd rather run TCW3 marine oil with proper tune, than Jaso FD oil and improper tune.
Still think 100:1 is nutso. Before you can tune for the oil mix you're running, there actually has to be oil.
hotajax
ArboristSite Operative
Get VP Fuels full synthetic and let your stuff run happy happy happy.
I’d say that the different cans of trufuel was the issue here not the ratio. After all, trufuel is just ethanol free unleaded, it has a shelf life and will age differently depending on when it was made. I’m confident you’d not see that change if you used the same tank of pump gas and just changed the ratio by 1%.
Going super lean for 1% difference in mix doesn’t sound right. It may change the rpm by a very small margin noticable via a tachometer.
I’ll report back tomorrow and happy to admit I’m wrong if I am.
Did you try doing a search on the site for "oil thread"?
Last I checked, there were (approximately) 5,487,345,098,754,308,974,523,089,475 oil threads on the site. (And those are just from this month.)
Last I checked, there were (approximately) 5,487,345,098,754,308,974,523,089,475 oil threads on the site. (And those are just from this month.)
Incorrect, at least in the USA. Tru-Fuel is alkylate petrol, a completely different formula from pump gas. Similar to avgas, without the lead.
The Shooters Apprentice
Addicted to ArboristSite
I've never run the stuff, but I think trufuel is higher octane then what can usually be found at the pump.
Tru-fuel Is not alkylate, it’s literally just 92 octane ethanol free unleaded petrol wjth 2 stroke oil and stabiliser. Motomix and aspen are alkylate fuels, trufuel isn’t.
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