Well I just came in from shutting down a Briggs powered generator from a five hour run and it was running on 91 octane, has no high compression and no damage. Same gas I have been running for a few years now in all my small engines. It will not make an old engine a new one and neither will semi synthetic oils but both sure run nice.
All of the premium equipment makers recommend (require) 89-91 minimum. Sthil, Husky, dolmar, all run around 10:1 ratios, at least on their saws.
Lots of people think high octane gas is better, as it is marketed as "premium". Make one think if regular gas is substandard junk. Not so. Most people wouldn't know OCTANE if it jumped up and bit them.
Apart from small engines, I had a buddy of mine in the "old days" who insisted on running his 1200 CC Volkswagen on Super Shell. He used it all the time for nearly two years. I told him beware, but he knew better, or so he said.
Afetr the two year time period, the engine ran like crap. We removed it, disassembled it on a piece of plyboard on his mother's washing machine, and found that all the piston rings were stuck in their grooves (almost like welded), the exhaust valves has eroded to the point there was no valve margin left, and the heads had cracked between adjacent exhaust valve seats. This is visual speak for HEAT.
Continental aircraft engines of the C-85, C-90 and O-200A ilk: These were rated for old 80/87 octane avgas, and if that was all that the engine got fed, it hummed along until well over TBO. All I had to do was time mags, clean & gap plugs, and change oil. Once 80/87 wasn't arond any longer, the only avgas to use was 100/130 octane. I can attest to the fact that after about 300 hours of using this stuff, I was removing cylinders (at least one) and replacing intake valves and dressing seats.
If the engine does require, or isn't designed for, hi-octane gas, there is no advantage, and quite a few expensive disadvantages to using it.
Okay, thanks for all of the information. That helps a lot.
You can run what ever octane you want and it isn't going to hurt anything. As I said before I use Sunoco 93 octane with ethanol in everything, ZTR's all the stihl equipment trimmers, blowers etc. and have for the last ten years I've been in business and never had any problems with any of my engines Kohler, Honda, Kawasaki Stihl or Echo. Run what ever your comfortable with, if you run the 87 octane stuff and your engine doesn't or isn't running the way you think it should switch to the premium gas and see if there is a difference. I personally think my equipment runs better on the 93 octane. Experiment with the different octane gas and run the one you think runs or is better, as I said you can run what ever octane you want and it isn't going to hurt anything.
You can run what ever octane you want and it isn't going to hurt anything. As I said before I use Sunoco 93 octane with ethanol in everything, ZTR's all the stihl equipment trimmers, blowers etc. and have for the last ten years I've been in business and never had any problems with any of my engines Kohler, Honda, Kawasaki Stihl or Echo. Run what ever your comfortable with, if you run the 87 octane stuff and your engine doesn't or isn't running the way you think it should switch to the premium gas and see if there is a difference. I personally think my equipment runs better on the 93 octane. Experiment with the different octane gas and run the one you think runs or is better, as I said you can run what ever octane you want and it isn't going to hurt anything.
Ric,
I'm really surprised that you run ethanol gasoline in your equipment....you do add Sta-Bil, Seafoam or some type of treatment to offset the ethanol related problems right??? I do agree about less engine/carb/etc. problems with the higher octanes and I've decided to use the mid-grade(89 octane) non-ethanol in all of my small engines(and 125hp Mercury 2-stroke outboard on my boat), cause the premium(93 octane) non-ethanol is just too expensive. I figure the 89 octane(and I add Sta-Bil to all of them) and being non-ethanol should ensure good performance, no fuel-related problems and longevity. Can you not find non-ethanol in your area or why did you decide to use ethanol gas???
Used regular 87 with ethonol no treatment for years no fuel related problem as of yet.
You have a lawn maintenance business, the gas probably doesn't stay in any of your equipment for more than a week or so and you're lucky to boot:0)
I sure hope you drain the remaining gas out of all of your equipment at the end of each season if you don't add Sta-Bil or Seafoam to treat it. If you don't, you're asking for eventual problems and "we told you so"!!
I run 87 I do not add anything to my gas. Never have had any trouble.
I think this is all made up crap.
Why do the car dealers not tell you if you don't drive your car for a month drain the gas?
Gas sit in my 68 camaro for 6 months or more never any trouble in the past 15 years.
Now gas only sits in my mower over night
(( racing is the only sport that you need two balls ))
I run 87 I do not add anything to my gas. Never have had any trouble.
I think this is all made up crap.
Why do the car dealers not tell you if you don't drive your car for a month drain the gas?
Gas sit in my 68 camaro for 6 months or more never any trouble in the past 15 years.
Now gas only sits in my mower over night
(( racing is the only sport that you need two balls ))
Carscw,
I can't believe you treat a classic like that Camero like that:0(
My father-in-law has a 1979 Chevelle SS396 and runs nothing but non-ethanol premium grade in it. Almost all of the major manufacturers of small engines had "adapted" their components to be OK with the 10% ethanol blend but still "warn" about letting it sit in a tank more than 30 days or over the winter. They all "STRONGLY" emphasize that anything higher than 10% ethanol will "void the engine warranty" which reinforces what user Tom59 just eluded to. Below is a link to a news release where you can take a Husqvarna "online ethanol test". I suggest you spend a few minutes to see if you can "pass" the test:0)
Take the Ethanol Challenge by Husqvarna - Fuel, Campaign
Also, below is a link to the Top Ten Facts about ethanol gasoline(most of which many of us had no idea about:0(
Top Ten Facts about Ethanol
IMHO, our government has "brainwashed us" into believing that the ethanol additive in gasoline is good for the environment and economy:0(
In North Dakota, New Mexico, and Idaho, ethanol proponents have offered a $100 reward to any customer who can document damage from ethanol to his or her car, and so far no one has ever collected.
I guess no one can prove it hurts anything.
Ethanol gets blamed for a lot on here just like no matter what is wrong with your mower a hand full of guys on here always will say check your valves.
(( racing is the only sport that you need two balls ))
When you buy a new car where does it say to run non - ethanol gas?
For years people have been putting additives In there gas that if you read the bottle it has ethanol in it.
Y'all act like someone just now invented ethanol when it's been around for 30 plus years.
Back when my car was made it ran on leaded gas now here is a amazing fact leaded fuel was 80% gas and 20% ethanol.
Jan 7, 2013 - Nonetheless, the history of tetraethyl lead (TEL) has lessons to teach us. Its origins as ... Motor fuel made up of about 80% gasoline and 20% ethanol worked beautifully.
Ethanol began being used in 1979 and auto manufactures did not address the use of ethanol blended fuels. Then when they began testing their vehicles with the new blended fuels, they were able to approve the use of the 10% ethanol blended fuels. Some went as far as to recommend the new blended fuels in their vehicles.
Will ethanol hurt my older engine designed for leaded gas?
No. The concern about older engines came about because of the lead phase-out. Lead oxides that were formed during combustion provided a cushion that reduced wear on non-case-hardened valve seats. Therefore, it is the absence of lead, not the presence of ethanol, that is of concern.
Why do some mechanics say not to use ethanol?
A mechanic who says not to use ethanol does not have correct information. There is very little information available for mechanics on fuel formulation, so when there appears to be a fuel-related problem with an engine, some mechanics will immediately ask if ethanol has been used. The only reason ethanol is suspected is that in many states it is the only gasoline component other than lead that has an identifying label. In North Dakota, New Mexico, and Idaho, ethanol proponents have offered a $100 reward to any customer who can document damage from ethanol to his or her car, and so far no one has ever collected.
Can I use it in my lawn mower?
No, you'll have to stop mowing the lawn every week. Only kidding, I thought I saw a few people smile at that prospect. The answer is yes, you can use the 10% ethanol blended fuels anywhere you use regular unleaded fuel. It can be used in any lawn mower, snow plow, snowmobile, ATV and any other gas powered engine. There may be some carburetor adjustment needed, so always refer to your equipments owners manual before using it.
(( racing is the only sport that you need two balls ))
And I bet you all so think that George Zimmerman was guilty.
I have never had any trouble because of ethanol and do not know anyone that has.
We can both find more than enough junk online to prove our side.
You say you have fuel lines that the ethanol ate up. What tests do you do to come up with this?
(( racing is the only sport that you need two balls ))
C'mon Carscw...you are just being argumentative now. You didn't answer my question about your source. Wickepedia(my last excerpt) is highly respected/reliable Internet information. I agree with another poster...just because you haven't had problems or don't personally know anyone who has doesn't mean that ethanol doesn't cause problems. The evidence is quite overwhelming that it does and IMHO you are playing Russian Roulette simply ignoring the potential problem(leaving ethanol in that classic car sitting for 6 months). I sure hope for your sake that your luck holds out.
P.S.
What does any of this have to do with Zimmerman????.....that's pretty desperate:0(