Is 89 or 93 octane gas slicker?

I have no lab tests or anything. But, that sounds like nonsense, to me. "Valves" such as intake valves are exposed only air and gas vapor. Exhaust valves, vapors, and, well, exhaust.

Any fuel line parts are in contact with fuel, full time.

Christopher A. Young Learn more about Jesus

Is this true?

On Sat, 23 Jun 2012 17:57:45 -0400, Jack Legg wrote Re Is 89 or 93 octane gas slicker?:

No.

Hi, First, what is Octane value? Why 89 or 93? 91 won't do? What kinda talk is that? I use Shell 91 always, some times 94 blended with Ethanol. Owner's manual always mention about proper gas to use for the engine.

Teh author also claims:

"Old fuel and various debris can collect inside gaskets in the carburetor. Cleaning the gaskets is a simple process, but one that should be carried out only by an experienced mechanic, as it involves disconnecting the fuel tank from the rest of the mower."

Jack Legg wrote in news: snipped-for-privacy@giganews.com:

Next time you fill up, take a look at the stickers on the pump near the buttons where you select the grade you want. Also, your engine's valves do not have any rubber on them.

Octane has zero to do with how "slick' the gas is. Rubber-deterioration has to do with the ETHANOL in the gas. All gasoline engines since about 1975 are rated for up to 10% ethanol. This means that the polymers present in the fuel system are able to withstand the damaging effects of alcohols up to a 10% concentration.

Using too much ethanol in a small engine might burn the engine out. That's what a chain saw repairman for an authorized Stihl dealer and repair centre told me. He said if you can't avoid ethanol based gasoline, get the highest octane available for your small engine because it'll help cut down on pre-ignition

Mower? I thought we were talking about cars. I'm so, totally terrified. Teh author claims it should be carried out (not done, it's too simple to "done") by experienced mechanic? And, to think I've risked my life so many times, working teh lawn mower? I'm amazed to be alive. I'm so grateful, God! I'll even go to church tomorrow! [sarcasm off, now]

Christopher A. Young Learn more about Jesus

Teh author also claims:

"Old fuel and various debris can collect inside gaskets in the carburetor. Cleaning the gaskets is a simple process, but one that should be carried out only by an experienced mechanic, as it involves disconnecting the fuel tank from the rest of the mower."

I'll have to tell them to change their stickers, immediately. I've been to several gas stations this week, and they mistakenly had 87 octane for sale. I'll tell them to correct the labels, imediately. After all, invalid at example dot com said so.

I only have to look NEXT time? I usually look every time.

Christopher A. Young Learn more about Jesus

93-octane is also known as "Premium". This is usually the most expensive grade your station sells.

Usually there's also a mid-grade that's 91-octane.

Next time you fill up, take a look at the stickers on the pump near the buttons where you select the grade you want. Also, your engine's valves do not have any rubber on them.

Octane has zero to do with how "slick' the gas is. Rubber-deterioration has to do with the ETHANOL in the gas. All gasoline engines since about 1975 are rated for up to 10% ethanol. This means that the polymers present in the fuel system are able to withstand the damaging effects of alcohols up to a 10% concentration.

LMAO!!

that's bullshit also.

ACTUALLY, the standard regular unleaded is 87.

"Stormin Mormon" wrote in news:sxtFr.382544$ snipped-for-privacy@news.usenetserver.com:

Oops, sorry. I messed up.

93-octane would be a super-premium, and is not offered by all companies.

In any case, as I said before, octane has nothing to do with "slickness", and it has nothing to do with how destructive the gas is to the polymeric components of the fuel system. Destructiveness is a function of alcohol- content.

Steve Barker wrote in news:TpCdnS8mU6dy-3vSnZ2dnUVZ snipped-for-privacy@giganews.com:

Yes, you're right. See my other reply, to Stormin' Mormon.

But.... but... but..... I read it on the internet! (Don't worry about it. I maik mistakes, too.)

Christopher A. Young Learn more about Jesus

Oops, sorry. I messed up.

93-octane would be a super-premium, and is not offered by all companies.

In any case, as I said before, octane has nothing to do with "slickness", and it has nothing to do with how destructive the gas is to the polymeric components of the fuel system. Destructiveness is a function of alcohol- content.

Why's that?

Only way it would make sense is if the 89 is not ethanol added fuel.

Because small engines don't have a high enough compression ratio for pre-ignition to be a problem. If they did, you'd see a lot of recommendations from small engine manufacturers to use higher octane gasoline in say your lawn mower. I've never seen one that calls for anything higher octane than regular.

As for burning the engine out, I've had a lot of small engines over the years in a variety of typical applications. I've yet to see one "burned out". In my experience, as long as you change to oil, make sure it has oil, etc., the end of life has always come due to some other failure. Latest is my Honda self-propelled mower, where the tranny died. Given the age and cost for a new one, decided it wasn't worth it. Engine? It's still running fine on regular unleaded.

I bet that guy Spivey can't even name the rubber parts in a lawn mowers fuel system.

Ethanol actually runs cooler, thus the reason for less gas mileage out of it than with gasoline. Ethanol raises the octane rating. The worst thing about ethanol is the fact that it absorbs water (after a great period of time) and it's effect on rubber over a great period of time.