What octane gas do you use and what 2 cycle oil?

[Green Industry Pro]

Several people have posted on my other threads saying that Im dumb due to the questions I was asking etc...So Im clearing that issue up right now.Im making this thread to get an idea of what others use,not because I cant figure out how to get to a gas station.LOL.Anyways, Im curious at what octane gas you guys use.I am also interested at which 2 cycle oils u guys use(also ive never used fuel stabilizer).Thanks in advance for your posts:usflag::usflag:I wish I had some witty saying or one liner but I dont off the top of my head.

[Steven B]

I use 91 with Stihl orange bottle, it has fuel stabilizer mixed in. Just picked up a box of shindaiwa oil.

[Green Industry Pro]

Oh my gosh,you have the MS660!!!!!!!!!The fastest stock saw!!!Expensive

[Whitey4]

RedMax machines REQUIRE 89 octane. Since I have RedMax gear, all of my machines get 89. I do use a stabilizer most of the time. When I know I'll run thru my gasoline in a day or two, I'll skip using it. I am sure to use it in the spring and fall when I might use the same gas cans for a week.

I also empty my machines in the fall, and run them dry. Old gas CAN damage a machine.

[M & MD Lawn]

89 octane and pro-mix from lowes for me

[Steven B]

Oh my gosh,you have the MS660!!!!!!!!!The fastest stock saw!!!Expensive

I got it cheap, some work needed to be done to it. It's not the fastest stock saw. The Stihl 090 is a bad ass saw. 137cc & it can run a 60"+ bar on it. Here's a 880 with a 72" bar.

[Green Industry Pro]

Is that one yours?The world record for a stock saw in the STIHL TIMBERSPORTS competition=2 cuts on a 16in. pine in 10sec. with an ms660.Thats what I meant.

[topsites]

93 premium, Opti-2

[Steven B]

Is that one yours?The world record for a stock saw in the STIHL TIMBERSPORTS competition=2 cuts on a 16in. pine in 10sec. with an ms660.Thats what I meant.

Did not know that. The 880 isn't mine, I don't have one yet:laugh:. My 660 has a 36" bar on it, thinking about putting a 24" bar on it. It's really nose heavy with the 36".

[TYCINC]

87 octane and Walmart oil by the gallon. . Its ten bucks as opposed to $35 for the Stihl orange bottle. . Been running it for years with no problems :)

[exmark614]

That saw is insane!!

89 w/ stihl HPU for blowers

89 w/ echo opti2 for trimmers

[DLAWNS]

RedMax machines REQUIRE 89 octane. Since I have RedMax gear, all of my machines get 89. I do use a stabilizer most of the time. When I know I'll run thru my gasoline in a day or two, I'll skip using it. I am sure to use it in the spring and fall when I might use the same gas cans for a week.

I also empty my machines in the fall, and run them dry. Old gas CAN damage a machine.

I also use midgrade in all of my handhelds, blowers etc. I run all Redmax and use the redmax oil.

By the way bro don't listen to some of the punks on the site that say you're questions are stupid. There are a bunch of people on this site that just don't know when to shut their mouth. Weed through all those guys and there are some great opinions and some great information. Good luck!

[grassman177]

we normally run 89 or 87. cant seem to find any difference in wear on the machines running either. but echo handhelds we have dont run well on 87 above 85degrees F.

we use opti-2 mix oil at one pouch(1.5 oz????), which is like a small bottle, to 2.5 gal of gas. whatever that ratio turns out to be and dont clean ports on the machines but once or worst twice per year. usually depends on the hourly demands of the machine .

[Sammy]

89 octane and Stihl oil
92 octane when the temps go up in July and August.

[anotherturfgeek]

Stihl equip-93 octane gas- orange bottles of stihl oil

[KeystoneLawn&Landscaping]

89 octane with echo oil as per manufactures specs....have been told by dealer that the 87 can/will cause deposits that will scratch and junk cylinder walls....any higher than 89 "may" cause engines to run a little warmer than normal and "may" lead to quicker wear

[MLAWCARE]

Stihl equip-93 octane gas- orange bottles of stihl oil

Same except I run it also in my redmax blower.

[unkownfl]

People have this misconception that higher octane means its more refined or has less impurities which is crazy. I use 87 but owners manual suggest to use 89+. I check the spark plugs and have never seen any issues with using the 87.

[mdlwn1]

Octane is rated on an AVERAGE. 87 can easily be 85. If you search the topic on the web you can get the specifics.

[anotherturfgeek]

I have a very good stihl dealer that I purchase all equip from and He showed me several machines in his shop he was repairing that the owners use 87 octane were gummed up. Using the equp day in day out with the 93 octane really does make a difference over the life of the equipment. Less breakdowns, easier starts and runs like new always!

[punt66]

I have a very good stihl dealer that I purchase all equip from and He showed me several machines in his shop he was repairing that the owners use 87 octane were gummed up. Using the equp day in day out with the 93 octane really does make a difference over the life of the equipment. Less breakdowns, easier starts and runs like new always!

Nope! As a mechanic and engine builder i will say your incorrect. Octane has nothing to do with anything getting gummed up. The only effect has to do with detonation period.

[anotherturfgeek]

Nope! As a mechanic and engine builder i will say your incorrect. Octane has nothing to do with anything getting gummed up. The only effect has to do with detonation period.

Don't really want to hijack this person's thread but as this is related and I'm sure with your area of expertise being a mechanic/engine builder (I'm just a damned old lawn Jockey/turfgeek.
So what you are saying that if I run 93 octane gas in my equipment, it won't run hotter and burn up more impurities in the gas and in the process not gum up my spark plugs as often and engine? Also, my eyes must be getting worse cause I seen it with them. The difference...

Please feel free to elaborate as the info will most likely go along way with other turfgeeks...

[RonAyersMotorsports]

I run 93 octane and STIHL full Synthetic with all my 2 cycle equipment. No matter the make. Less carbon build up, stays stable longer, and more cleansing agents. It does make a difference.

[mowzilla]

opti-2 or shindaiwa one oil and 89 octane in everything usually qt or texaco due t good additive package

[unkownfl]

Octane is rated on an AVERAGE. 87 can easily be 85. If you search the topic on the web you can get the specifics.

87 is the minimum rating it can be, so you shouldn't be getting anything less at a street pump that charges taxes.

[Lawn Man Dave]

Nope! As a mechanic and engine builder i will say your incorrect. Octane has nothing to do with anything getting gummed up. The only effect has to do with detonation period.

Agreed.

-Aircraft Mechanic.

[punt66]

Don't really want to hijack this person's thread but as this is related and I'm sure with your area of expertise being a mechanic/engine builder (I'm just a damned old lawn Jockey/turfgeek.
So what you are saying that if I run 93 octane gas in my equipment, it won't run hotter and burn up more impurities in the gas and in the process not gum up my spark plugs as often and engine? Also, my eyes must be getting worse cause I seen it with them. The difference...

Please feel free to elaborate as the info will most likely go along way with other turfgeeks...

Thats correct. If your getting improved performance with a higher octane gas then the lower octane is causing detonation or pinging for the not so engine savy. High octanr does NOT burn hotter. A hotter plug may make a difference. Your wasting money on high octane if your equipment is not detonating.

[unkownfl]

Thats correct. If your getting improved performance with a higher octane gas then the lower octane is causing detonation or pinging for the not so engine savy. High octanr does NOT burn hotter. A hotter plug may make a difference. Your wasting money on high octane if your equipment is not detonating.

The only thing I can think of is he is seeing the material of the engine melting because of the detonation. Octane is the rating for how much compression it can take before it turns into a vapor if I remember right. This is a totally different engineering class than what I ended up going through. He may be thinking that detonation causes most head gaskets to blow and is assuming it is because of the heat which is not true.

[anotherturfgeek]

Thats correct. If your getting improved performance with a higher octane gas then the lower octane is causing detonation or pinging for the not so engine savy. High octanr does NOT burn hotter. A hotter plug may make a difference. Your wasting money on high octane if your equipment is not detonating.

What I was seeing was someone else's equip in for repairs. My authorized Stihl dealer/mechanic was showing me the effects of using the lower octane gas and or shitty oil mix.
As I said before my stuff works like new always has!
Trimmers, saws, blowers etc...

:hammerhead:

[punt66]

What I was seeing was someone else's equip in for repairs. My authorized Stihl dealer/mechanic was showing me the effects of using the lower octane gas and or shitty oil mix.
As I said before my stuff works like new always has!
Trimmers, saws, blowers etc...

:hammerhead:

so does mone and i use 87 with tractor supply oil. Have for years. My original trimmer still runs like a champ today. If you want to wast your money be my guest.

[punt66]

What I was seeing was someone else's equip in for repairs. My authorized Stihl dealer/mechanic was showing me the effects of using the lower octane gas and or shitty oil mix.
As I said before my stuff works like new always has!
Trimmers, saws, blowers etc...

:hammerhead:

something for you to read.
http://auto.howstuffworks.com/fuel-efficiency/fuel-consumption/question90.htm

[anotherturfgeek]

Pretty cool read thanks!

[STIHL GUY]

93 octane gas with Stihl HP Ultra Oil