661 Oil Test 32:1 vs 40:1 vs 50:1 ?

[mdavlee]

I've heard reports of Autotune saws not running well on 32:1.

Mine like it just fine. Weird? Yeah I guess.

My 550 didn't like 110 fuel with K2. It needed a 1/4 tank to be able to idle without help

 

[KG441c]

My baby girls first Easter!

 

[SAWMIKAZE]

My 562 runs like a top at 32: 1.

My 241 didnt skip a beat on friday with 6 tanks at 32:1

Ran very well.

 

[svk]

I think the bigger question is what negative results there would be from running 32:1 other than running too low rpm over the life of saw.

I'm no expert. But my L65 made it about 35 years on 32:1 before it started losing compression. Granted some years I cut 2 cords and others I've done 20 plus.

 

[KenJax Tree]

Not at all . How much bigwood do u cut? 25" and up?

Well....25" is medium size at best and far from big. Are you really gonna questioning me about cutting big wood? Are you saying cookie cutters and firewood hacks cut bigger wood more often?[emoji23]

 

[Mastermind]

My wood is very hard......and quite large.

 

[KenJax Tree]

My wood is very hard......and quite large.

Pics?

 

[wendell]

LOL

 

[KG441c]

Well....25" is medium size at best and far from big. Are you really gonna questioning me about cutting big wood? Are you saying cookie cutters and firewood hacks cut bigger wood more often?[emoji23]

Not at all Chris! I was simply trying to figure out if u trim limbs or actually cut larger wood in your business. I dont have a clue what your background is? How many saws have u rebuilt or ported?

 

[WoodChuck'r]

LOL

This thread can get locked now.

 

[Mastermind]

Pics?

 

[bwalker]

So far what I got was add your oil to your can after you put the gas in and the driving to the site alone is enough mixing... Although I still give the can a shake no matter what before fueling...YMMV


So you blame prolonged use of synthetic for reduced throttle response and reduced ring seal? Maybe you should consider the general wear that comes with prolonged use to be the cause. What do you believe the cause is specifically and how can the occasional use of nonsynthetic some how reverse the effect of said synthetic? BS IMO

Complete BS!

 

[KenJax Tree]

Not at all Chris! I was simply trying to figure out if u trim limbs or actually cut larger wood in your business. I dont have a clue what your background is? How many saws have u rebuilt or ported?

I've rebuilt a few of my saws over the years...seals, bearings, rings, etc just from basic wear and tear never had anything completely grenade. I've never ported a saw. And as far as cutting wood...in 18 years of tree service i've done everything from a lilac bush to land clearing for housing, office buildings, stores, etc. i've definitely had my share of big wood.

 

[KG441c]

I've rebuilt a few of my saws over the years...seals, bearings, rings, etc just from basic wear and tear never had anything completely grenade. I've never ported a saw. And as far as cutting wood...in 18 years of tree service i've done everything from a lilac bush to land clearing for housing, office buildings, stores, etc. i've definitely had my share of big wood.

Your opinion counts! Lol! I open alota saws up and see what cheap oils do to them. Ill pay extra for good oil.

 

[MustangMike]

I think I've learned some stuff here:

Randy, quit pretending you have large hard wood, we all know you don't even like pop ups!

Chris, you said the OP should know what happens when he disagrees with the going opinion .... yeah .... I think I remember something about that!

So my take (which may or may not be worth anything, but it is my take):

50:1 likely works fine in stock saws, they are designed to run on it, and until I joined this site I ran 50:1 for many years w/o any problems.

Porting obviously puts more stress on a saw, and these saws will function better with addl lubrication.

The reason some people have trouble with autotune and 32:1 and others don't may have to do with the octane of the gas they mix with. I believe Randy uses 87 octane, if you start with higher octane, the additional oil may increase the octane too much.

I run full synthetic at 40:1 with 93 octane, so I'm glad I don't have to take sides here! FYI, the Stihl manual states that higher octane gas runs cooler! (I have never done any of my own testing to confirm this).

I'm looking forward to more testing from the OP.

Happy Easter everyone!

 

[bikemike]

oh I see now. Redbull obviously has an agenda?!??!!? Well what the heck is it?????? Give me a break. I posted results. I DO NOT CARE ABOUT THE "WHY or HOW".

32:1 was 7 sec slower and it was hotter. Period. In all the testing I've done... 2-3 seconds is a lot. 7 seconds is an azz beating! Someone wants to watch me mix the gas and tension the chains and do the tests. Go for it. I DO NOT CARE!!!!!!! Be nice to have someone to BS with while I'm doing this stuff.


and why is longevity so important to you porters anyway? You porters are building basically Hotsaws right? The whole point is to create insane performance. If 32:1 actually does kill performance that much...what is the point of porting? (if 32:1 has to be run in a ported saw due to the higher compression)

Did you tune the carb for each test. Hotter then it was leaner cause of thicker oil concentration. So any test was not accurate if ur running too lean ur not making more power even when it revin higher no load. Thas fuel and air makes the power. The oil lubes the engine. Temp tune for each mix ratio And then se what the times come out to. Bet you it wont be 2 3 seconds apart

 

[bwalker]

I think I've learned some stuff here:

Randy, quit pretending you have large hard wood, we all know you don't even like pop ups!

Chris, you said the OP should know what happens when he disagrees with the going opinion .... yeah .... I think I remember something about that!

So my take (which may or may not be worth anything, but it is my take):

50:1 likely works fine in stock saws, they are designed to run on it, and until I joined this site I ran 50:1 for many years w/o any problems.

Porting obviously puts more stress on a saw, and these saws will function better with addl lubrication.

The reason some people have trouble with autotune and 32:1 and others don't may have to do with the octane of the gas they mix with. I believe Randy uses 87 octane, if you start with higher octane, the additional oil may increase the octane too much.

I run full synthetic at 40:1 with 93 octane, so I'm glad I don't have to take sides here! FYI, the Stihl manual states that higher octane gas runs cooler! (I have never done any of my own testing to confirm this).

I'm looking forward to more testing from the OP.

Happy Easter everyone!

All motor gasoline has roughly the same BTU so 93 doesn't burn any hotter than 87.
I run non ethanol 93 in everything is a bit of insurance.

 

[Deleted member 83629]

93 burns a little slower than 87. and my equipment runs cooler on 93 as opposed to 87.

 

[bwalker]

93 burns a little slower than 87. and my equipment runs cooler on 93 as opposed to 87.

It probably doesn't burn any slower or run any cooler.
Octane is a measure of a fuels resistance to detonation. Detonation takes time so the faster you can combust the better. Heat is a function of BTU and all motor gasoline has simular BTU content.

 

[sunfish]

The Mother of all oil threads! Cool...