What kind of fuel & mix oil do you use?

Therrin · 28th July 2010, 09:35 PM

I'm pretty sure we've discussed this intermitantly on a few other threads, but I'd like to get all the data together in one place on it.

I've been using almost exclusively 91 octane fuel from Chevron or Shell gas stations, and a few years back I switched to Stihl's fully synthetic mix oil. I never use any other brand or type.

After having had some trouble with scored P&S's on my 361, and having bought new a new 260p and 660; I'm trying to make sure that I have no more issues with P&S problems. I've been considering switching up to "racing fuel", as available from some places out here. Ethanol free and somewhere around 100 octane or better.

Are there any suggestions for this? What are the rest of you folks using? What have you had good or bad experiences with?

MS 390 (Denmark) · 28th July 2010, 11:07 PM

aspen 2%

Therrin · 28th July 2010, 11:21 PM

I have no idea what that means. Can you expound on that a little?

BTW... you have the hugest signature section I've EVER seen. It really takes up alot of room on a page. Is there some reason you made it all that big? Couldn't you fit in the same information without using massive fonts that take up so much space??

MS 390 (Denmark) · 29th July 2010, 07:24 AM

Quote:

Originally Posted by Therrin

I have no idea what that means. Can you expound on that a little?

BTW... you have the hugest signature section I've EVER seen. It really takes up alot of room on a page. Is there some reason you made it all that big? Couldn't you fit in the same information without using massive fonts that take up so much space??

it´s gas that is very clean and allready mixed with oil,companies must use this,it´s the law in little Denmark,

lol it´s because off saws that I have

Cut4fun · 29th July 2010, 11:42 AM

Lot of people I email use aspen. I've heard about it for at least 3 years I guess.
I always wondered about the oil quality in the aspen mix?

We have can stuff now pre mixed in 40:1 and 50:1. No clue what it is or care for the price.

I still run 32:1 or 40:1 93 octane Klotz 100% that mixes with alcohol. Checked with their tech to make sure it would stay mixed with ethanol too, unlike some the other brands.

Tested race fuel and AV fuel for awhile, not worth it for my use, besides shelf life. JMO.

MS 390 (Denmark) · 29th July 2010, 07:30 PM

aspen is expensive,25DKR/L=4,37USD/Liter

Therrin · 29th July 2010, 11:27 PM

Quote:

lol it´s because off saws that I have

Well thanks for fixin' it up anyhow

Apparently we don't have it over here in the 'states, but have ya'll heard about Stihl's "motomix"? It's apparently some pre-mixed stuff but it's supposed to burn EXTREMELY clean or something. I cant find the article I had previously read about it.

MS 390 (Denmark) · 29th July 2010, 11:42 PM

Quote:

Originally Posted by Therrin

Well thanks for fixin' it up anyhow

Apparently we don't have it over here in the 'states, but have ya'll heard about Stihl's "motomix"? It's apparently some pre-mixed stuff but it's supposed to burn EXTREMELY clean or something. I cant find the article I had previously read about it.

pre mixed aspen is in same category,but cheaper....... and it don´t stings in the eyes if you cutting a place,where there is no wind.... nice

Cut4fun · 30th July 2010, 05:41 AM

Here is the premix fuel we have around here. You can buy it just about anywhere in the lawn garden sections.

50 Fuel - Ready To Use - Premixed Gas + Oil - Engineered For 2 Cycle Engines

Therrin · 30th July 2010, 11:55 AM

Ahh, yes I've actually seen that in my saw shop.

Something about buying premixed kinda bugs me the same way as when I see them selling radiator coolant and water premixed; and of course, charging much more for it that way.

So when you're going through a gallon of fuel or more a day, that seems like it'd get pretty expensive.

1.5 Gallons for $25 (not including shipping)

MS 390 (Denmark) · 31st July 2010, 02:35 AM

Quote:

Originally Posted by Therrin

Ahh, yes I've actually seen that in my saw shop.

Something about buying premixed kinda bugs me the same way as when I see them selling radiator coolant and water premixed; and of course, charging much more for it that way.

So when you're going through a gallon of fuel or more a day, that seems like it'd get pretty expensive.

1.5 Gallons for $25 (not including shipping)

Home - clean fuels,environmental and green fuels, petrol and bio diesel in the uk

treeshaveneeds · 1st August 2010, 01:35 AM

I use the hi test gas - 94 octane or higher, most of the gas sold here is either regular, high octane, or a mix 50:50 of both. But the regular usually includes 10% ethanol, so hi-test is the choice. Since I run mostly stihls, I use the stihl oil, at 40:1 . I have found the saws last longer with a slightly richer mix; the 50:1 meant the saws needed more servicing, and had a shorter life. A synthetic mix was available for a while when I was using Husqvarna's at 100:1 but the saws only lasted about 2 years.

Cut4fun · 1st August 2010, 06:07 AM

Quote:

Originally Posted by treeshaveneeds

I was using Husqvarna's at 100:1

MS 390 (Denmark) · 1st August 2010, 07:26 AM

when I get my 361 home from a good port job,what du you guys think the mix should sound like 1:50/1:40??

Cut4fun · 1st August 2010, 07:37 AM

Just curious, what is your Aspen mixed at?

MS 390 (Denmark) · 1st August 2010, 07:44 AM

Quote:

Originally Posted by Cut4fun

Just curious, what is your Aspen mixed at?

2%
but after tuning does it need more oil in the gas??

Eric Frei · 1st August 2010, 11:00 AM

I've started using premium unleaded, 98 octane (AUS Rate) in my saws lately.

Whooohooo, more power, more revs and less stink. Nothing's blow up yet so all must be OK. I started doing this after other guys have showed they been doing it for years.

I use Stihl 2-stroke oil and mix at 32:1

Therrin · 1st August 2010, 11:20 AM

Ekka, yeah all the Stihl manuals actually say to use the highest octane you can find from the pump, and to "only use quality name-brand gasoline" or something along those lines.

Apparently the higher octane makes the saw run cooler?

stihlman441 · 1st August 2010, 12:15 PM

Been down the 98 oct road,all im going to say is after you have used it for awhile pull your mufflers off and i bet you have blow-bye past the piston rings.

I use 90,92 oct fully synthetic oil at 40:1

Also use Stabil fuel stabilizer.

Cut4fun · 1st August 2010, 01:08 PM

I bet that last pic is a 441. Almost all the 441 I have seen with some time on them look like that no matter the fuel used.

stihlman441 · 1st August 2010, 02:46 PM

No its a 660.

Cut4fun · 2nd August 2010, 06:06 AM

Quote:

Originally Posted by stihlman441

No its a 660.

Havent seen a new 660 look like that yet. Must be that new p+c maker they are putting on them NON-Mahle

Therrin · 2nd August 2010, 06:12 AM

Why don't they use NiSi on those instead of 'moly? Isn't it supposed to be better or something?

They already say 'moly is better "during the breakin period", but that NiSi lasts longer. What gives?

Cut4fun · 2nd August 2010, 06:16 AM

Quote:

Originally Posted by Therrin

Why don't they use NiSi on those instead of 'moly? Isn't it supposed to be better or something?

They already say 'moly is better "during the breakin period", but that NiSi lasts longer. What gives?

I dont know what you are asking.

But NiSi is the cylinder coating, Moly is a coating Baileys has the aftermarket put on the piston for break in. Comes right off the piston in no time.

Therrin · 2nd August 2010, 06:19 AM

Cylinders can be NiSi or chromoly, I'm asking why they don't use the NiSi on the pistons?? Is it just unnecessary?

Cut4fun · 2nd August 2010, 10:21 AM

I know of Chrome and Nikasil for cylinder coatings and Moly as a piston coating that comes off somewhat and Chromoly for building frames etc from.

Eric Frei · 2nd August 2010, 01:14 PM

Quote:

Originally Posted by stihlman441

pull your mufflers off and i bet you have blow-bye past the piston rings.

What's this?

Is it damaging or just looks bad?

stihlman441 · 2nd August 2010, 09:45 PM

I have spoken to three Stihl dealer mechanics about blow-bye and they all told the same thing "dont use high energy premium fuels" the saws are designed for 91 oct unleaded petrol.
Pull ya mufflers off and have a look.

Eric Frei · 2nd August 2010, 09:50 PM

Well, I have only been using premium for a few months, I better switch back to the gutless fuel.

Therrin · 2nd August 2010, 10:16 PM

what would it take to make/find/use parts that would handle the premium grade stuff?

I guess what I mean is... what causes the blow-by to occur? Whats happening inside?

28th July 2010, 09:35 PM	#1
Therrin Former Member Join Date: Oct 2007 Location: Bakersfield, Ca Posts: 2,512	What kind of fuel & mix oil do you use? I'm pretty sure we've discussed this intermitantly on a few other threads, but I'd like to get all the data together in one place on it. I've been using almost exclusively 91 octane fuel from Chevron or Shell gas stations, and a few years back I switched to Stihl's fully synthetic mix oil. I never use any other brand or type. After having had some trouble with scored P&S's on my 361, and having bought new a new 260p and 660; I'm trying to make sure that I have no more issues with P&S problems. I've been considering switching up to "racing fuel", as available from some places out here. Ethanol free and somewhere around 100 octane or better. Are there any suggestions for this? What are the rest of you folks using? What have you had good or bad experiences with?

28th July 2010, 11:07 PM	#2
MS 390 (Denmark) Sappling Join Date: Jan 2010 Location: Denmark Posts: 47	Re: What kind of fuel & mix oil do you use? aspen 2% __________________ Best regards Jan Stay Sharp.... My Saws: STIHL 046,MS361,MS200,MS192T

28th July 2010, 11:21 PM	#3
Therrin Former Member Join Date: Oct 2007 Location: Bakersfield, Ca Posts: 2,512	Re: What kind of fuel & mix oil do you use? I have no idea what that means. Can you expound on that a little? BTW... you have the hugest signature section I've EVER seen. It really takes up alot of room on a page. Is there some reason you made it all that big? Couldn't you fit in the same information without using massive fonts that take up so much space??

29th July 2010, 11:42 AM	#5
Cut4fun Former Member Join Date: Dec 2009 Location: midwest Posts: 589	Re: What kind of fuel & mix oil do you use? Lot of people I email use aspen. I've heard about it for at least 3 years I guess. I always wondered about the oil quality in the aspen mix? We have can stuff now pre mixed in 40:1 and 50:1. No clue what it is or care for the price. I still run 32:1 or 40:1 93 octane Klotz 100% that mixes with alcohol. Checked with their tech to make sure it would stay mixed with ethanol too, unlike some the other brands. Tested race fuel and AV fuel for awhile, not worth it for my use, besides shelf life. JMO.

29th July 2010, 07:30 PM	#6
MS 390 (Denmark) Sappling Join Date: Jan 2010 Location: Denmark Posts: 47	Re: What kind of fuel & mix oil do you use? aspen is expensive,25DKR/L=4,37USD/Liter __________________ Best regards Jan Stay Sharp.... My Saws: STIHL 046,MS361,MS200,MS192T

30th July 2010, 05:41 AM	#9
Cut4fun Former Member Join Date: Dec 2009 Location: midwest Posts: 589	Re: What kind of fuel & mix oil do you use? Here is the premix fuel we have around here. You can buy it just about anywhere in the lawn garden sections. 50 Fuel - Ready To Use - Premixed Gas + Oil - Engineered For 2 Cycle Engines

30th July 2010, 11:55 AM	#10
Therrin Former Member Join Date: Oct 2007 Location: Bakersfield, Ca Posts: 2,512	Re: What kind of fuel & mix oil do you use? Ahh, yes I've actually seen that in my saw shop. Something about buying premixed kinda bugs me the same way as when I see them selling radiator coolant and water premixed; and of course, charging much more for it that way. So when you're going through a gallon of fuel or more a day, that seems like it'd get pretty expensive. 1.5 Gallons for $25 (not including shipping)

1st August 2010, 01:35 AM	#12
treeshaveneeds Veteran Heritage Status Join Date: Jun 2010 Location: Toronto, Ontario, Canada Posts: 1,399	Re: What kind of fuel & mix oil do you use? I use the hi test gas - 94 octane or higher, most of the gas sold here is either regular, high octane, or a mix 50:50 of both. But the regular usually includes 10% ethanol, so hi-test is the choice. Since I run mostly stihls, I use the stihl oil, at 40:1 . I have found the saws last longer with a slightly richer mix; the 50:1 meant the saws needed more servicing, and had a shorter life. A synthetic mix was available for a while when I was using Husqvarna's at 100:1 but the saws only lasted about 2 years.

1st August 2010, 07:26 AM	#14
MS 390 (Denmark) Sappling Join Date: Jan 2010 Location: Denmark Posts: 47	Re: What kind of fuel & mix oil do you use? when I get my 361 home from a good port job,what du you guys think the mix should sound like 1:50/1:40?? __________________ Best regards Jan Stay Sharp.... My Saws: STIHL 046,MS361,MS200,MS192T

1st August 2010, 07:37 AM	#15
Cut4fun Former Member Join Date: Dec 2009 Location: midwest Posts: 589	Re: What kind of fuel & mix oil do you use? Just curious, what is your Aspen mixed at?

1st August 2010, 11:00 AM	#17
Eric Frei Admin - Razor sharp and independent 2 X Diploma Level 5 qualified arborist Join Date: Jan 2007 Location: Brisbane Posts: 12,820	Re: What kind of fuel & mix oil do you use? I've started using premium unleaded, 98 octane (AUS Rate) in my saws lately. Whooohooo, more power, more revs and less stink. Nothing's blow up yet so all must be OK. I started doing this after other guys have showed they been doing it for years. I use Stihl 2-stroke oil and mix at 32:1 __________________ Protect your rights to work - Join Australian Tree Association My businesses:- Qualified Brisbane Tree Lopping \| Stump Grinding Brisbane \| Brisbane - Gold Coast Consulting Arborist

1st August 2010, 11:20 AM	#18
Therrin Former Member Join Date: Oct 2007 Location: Bakersfield, Ca Posts: 2,512	Re: What kind of fuel & mix oil do you use? Ekka, yeah all the Stihl manuals actually say to use the highest octane you can find from the pump, and to "only use quality name-brand gasoline" or something along those lines. Apparently the higher octane makes the saw run cooler?

1st August 2010, 12:15 PM	#19
stihlman441 Semi-mature vigorous tree Join Date: Apr 2009 Location: Australia,near Geelong Vic Posts: 117	Re: What kind of fuel & mix oil do you use? Been down the 98 oct road,all im going to say is after you have used it for awhile pull your mufflers off and i bet you have blow-bye past the piston rings. I use 90,92 oct fully synthetic oil at 40:1 Also use Stabil fuel stabilizer. Attached Thumbnails

1st August 2010, 01:08 PM	#20
Cut4fun Former Member Join Date: Dec 2009 Location: midwest Posts: 589	Re: What kind of fuel & mix oil do you use? I bet that last pic is a 441. Almost all the 441 I have seen with some time on them look like that no matter the fuel used.

1st August 2010, 02:46 PM	#21
stihlman441 Semi-mature vigorous tree Join Date: Apr 2009 Location: Australia,near Geelong Vic Posts: 117	Re: What kind of fuel & mix oil do you use? No its a 660.

2nd August 2010, 06:12 AM	#23
Therrin Former Member Join Date: Oct 2007 Location: Bakersfield, Ca Posts: 2,512	Re: What kind of fuel & mix oil do you use? Why don't they use NiSi on those instead of 'moly? Isn't it supposed to be better or something? They already say 'moly is better "during the breakin period", but that NiSi lasts longer. What gives?

2nd August 2010, 06:19 AM	#25
Therrin Former Member Join Date: Oct 2007 Location: Bakersfield, Ca Posts: 2,512	Re: What kind of fuel & mix oil do you use? Cylinders can be NiSi or chromoly, I'm asking why they don't use the NiSi on the pistons?? Is it just unnecessary?

2nd August 2010, 10:21 AM	#26
Cut4fun Former Member Join Date: Dec 2009 Location: midwest Posts: 589	Re: What kind of fuel & mix oil do you use? I know of Chrome and Nikasil for cylinder coatings and Moly as a piston coating that comes off somewhat and Chromoly for building frames etc from.

2nd August 2010, 09:45 PM	#28
stihlman441 Semi-mature vigorous tree Join Date: Apr 2009 Location: Australia,near Geelong Vic Posts: 117	Re: What kind of fuel & mix oil do you use? I have spoken to three Stihl dealer mechanics about blow-bye and they all told the same thing "dont use high energy premium fuels" the saws are designed for 91 oct unleaded petrol. Pull ya mufflers off and have a look.

2nd August 2010, 09:50 PM	#29
Eric Frei Admin - Razor sharp and independent 2 X Diploma Level 5 qualified arborist Join Date: Jan 2007 Location: Brisbane Posts: 12,820	Re: What kind of fuel & mix oil do you use? Well, I have only been using premium for a few months, I better switch back to the gutless fuel. __________________ Protect your rights to work - Join Australian Tree Association My businesses:- Qualified Brisbane Tree Lopping \| Stump Grinding Brisbane \| Brisbane - Gold Coast Consulting Arborist

2nd August 2010, 10:16 PM	#30
Therrin Former Member Join Date: Oct 2007 Location: Bakersfield, Ca Posts: 2,512	Re: What kind of fuel & mix oil do you use? what would it take to make/find/use parts that would handle the premium grade stuff? I guess what I mean is... what causes the blow-by to occur? Whats happening inside?

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Fungus fuel	pomme	General Tree Chat	9	5th June 2011 10:34 PM
Fuel Tax Credits	glennak	General Tree Chat	0	26th April 2010 01:36 PM
Fuel leaking from vent tube	Straw	Chainsaws	5	15th August 2009 12:18 AM
World Fuel Crisis Looms!	clementine	Non Tree Related chat	38	13th July 2008 02:37 AM
Fueling Tips\| Fuel Saving Tips	Drouin Tree Service	Non Tree Related chat	10	2nd May 2008 06:53 PM