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View Full Version : Runn'n 2 Cycle On 89 Or Higher?


JOEWOOD
06-07-2005, 06:54 PM
http://www.fotosearch.com/thumb/phd/PHD147/14135.jpg

Read my Still Manual thoroughly!
Recommended Octane is 89 or higher, claims Regular will cause excessive Engine Heat etc.

Any views here?...Joe :waving:

LawnScapers of Dayton
06-07-2005, 07:08 PM
I always run the highest octane in my 2-cycle stuff.....

Derek

mowerman90
06-07-2005, 07:09 PM
In most states gas companies are allowed to add up to 10% alcohol to the gas without telling you. That's fine for mom's station wagon but not for 2 stroke equipment. You see, oil will not mix with alcohol. I've read stories on this forum and others where a brand new trimmer has "seized" because of this problem. Alcohol blended gases cannot achieve the higher octane ratings so it is safe to assume that "hy-test" gas does not contain any alcohol. All I've ever used in all of my 2 stroke equipment is "hy-test" gas.

lawnguy001
06-07-2005, 07:15 PM
Ran into this on Echo 2cycle stuff. Returned a stick edger under warranty and dealer said "bad gas" . Had to show that I used premium octane gas mix to get repairs covered warranty.

MercyMe
06-07-2005, 07:29 PM
89 + octane is very important in all of your hand held equipment especially backpack blowers that have very high compression.

VERY important!

DAVELAWN
06-07-2005, 09:09 PM
Been running 87 for years in everything, with no problems

riches139
06-07-2005, 09:57 PM
I run 87 too, but I also use Amsoil 100/1 synthetic mix. Probably helps in the heat department. :waving:

LightningLawns
06-07-2005, 10:35 PM
100/1? wouldn't that run too rich ?

parttimer
06-07-2005, 10:55 PM
:blob3: Local repair man said he has made a good living on people that dont pay attention to good clean gas . 89 or better. Alway keep it fresh . more oil dont help he said. The amsoil run great in all my trucks and car. :blob3:

lwcmattlifter
06-07-2005, 10:58 PM
100/1? wouldn't that run too rich ?
100/1 is lean.

lqmustang
06-07-2005, 11:03 PM
Alcohol blended gases cannot achieve the higher octane ratings


Actually, alcohol raises the octane of the gasoline.

LightningLawns
06-07-2005, 11:13 PM
Thats what I mean sorry, wouldn't it run to lean?

lwcmattlifter
06-07-2005, 11:53 PM
You would think so but there are lots of guys out there that do it with no problems. I have heard that if you run Amsoil/opti at 50:1 it will clog the exhaust and foul plugs. I have been running 87 in all my equipment (50:1 Mobil MX2T) without problems.

Richard Martin
06-08-2005, 05:57 AM
In most states gas companies are allowed to add up to 10% alcohol to the gas without telling you. That's fine for mom's station wagon but not for 2 stroke equipment. You see, oil will not mix with alcohol. I've read stories on this forum and others where a brand new trimmer has "seized" because of this problem. Alcohol blended gases cannot achieve the higher octane ratings so it is safe to assume that "hy-test" gas does not contain any alcohol. All I've ever used in all of my 2 stroke equipment is "hy-test" gas.

Alcohol (in the form of MTBE in my state) is added to fuel as an oxygenate. In other words they are leaning the fuel in an attempt to get better emissions. When you lean out the fuel you can get overheating and detonation. The end result could be premature wearout and seizing. All fuel in my part of the state contains MTBE from the cheasyest off brand 87 to Sunoco 93.

riches139
06-08-2005, 08:08 PM
Amsoil 100/1 synthetic is the name of the product.

I run my 2cycle equip. at more like 80/1. Some will run it at 100/1, but I'm not sure I want to try it.