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Old 11-26-2005, 23:33   #1 (permalink)
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New-100 Octane Optimax

Shell will have a new 100 octane Optimax with 5% ethanol in the servos by christmas, sounds good except for the Ethanol content. They do not recommend it for use in boats or aircraft but do not say why.
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Old 11-26-2005, 23:40   #2 (permalink)
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Re: New-100 Octane Optimax

from the fcai site......TECHNICAL REASONS FOR INABILITY TO USE E10
The following are reasons why certain vehicle models cannot or should not use E10 because of material incompatibility and driveability issues respectively. There are also comments on possible exhaust and evaporative emissions issues. This list was compiled from information submitted by manufacturers.

CANNOT USE BECAUSE OF MATERIAL INCOMPATIBILITY ISSUES

Early deterioration of components in fuel injection system:

Fuel tanks
Fuel lines/hoses
Injector seals
Delivery pipes
Fuel pump and regulator
Vehicles with carburettor fuel systems may experience hot fuel handling concerns and may experience a lower level of durability in some fuel system components.


not so good for carbys by the look of it.
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Old 11-27-2005, 00:09   #3 (permalink)
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Re: New-100 Octane Optimax

http://www.v8supercar.com.au/news/la...nd=M&gid=21502

By the sound of this report in might not be such a bad thing! Time will tell
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Old 11-27-2005, 00:39   #4 (permalink)
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Re: New-100 Octane Optimax

Anything from shell I'm reluctant to run. I came unstuck today and had to run optimax as BP and Mobil have no 98ron. Bastard thing detonates if you give it a quick squirt. I'll be back on Mobil or BP ASAP.
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Old 11-27-2005, 01:03   #5 (permalink)
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Re: New-100 Octane Optimax

I know what you mean about optimax. Biggest prob with mine is at idle/low revs on optimax, on ultimate its fine. Its funny how only a short time ago Ethanol was in the media portrayed as a bad thing and Shell was saying "none of our fuels have Ethanol" and now they are promoting it as having "the natural quality of ethanol" ...marketing at it's best!
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Old 11-27-2005, 01:20   #6 (permalink)
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Re: New-100 Octane Optimax

ill be giving it a try deffinetly!...sounds good to me!
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Old 11-27-2005, 02:40   #7 (permalink)
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Re: New-100 Octane Optimax

Quote:
Originally Posted by 4vxc
Shell will have a new 100 octane Optimax with 5% ethanol in the servos by christmas, sounds good except for the Ethanol content. They do not recommend it for use in boats or aircraft but do not say why.
Aircraft need a higher octane rating still, due to operating at higher altitudes where they lean out the mixtures a fair bit for economy and to keep the AFR right. Avgas has a 100/130 performance or octane rating.

Aircraft piston engines still require lead for their engine protection so it would be bad to use this new unleaded fuel......can't pull over onto the side of the road up there!! Avgas still uses lead addatives.
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Old 11-29-2005, 01:58   #8 (permalink)
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Re: New-100 Octane Optimax

rang my boat shop today and asked if I could use this fuel in my Mercury outboard. The mechanic said Mercury will not warrant any outboard that has run fuel with ethanol added because of the corrosion it causes and the fact it is hydroscopic, meaning it attracts moisture (water)
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Old 11-29-2005, 02:18   #9 (permalink)
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Re: New-100 Octane Optimax

It's not that much of a worry if you have a high hp clevo and drive it. I can easily use 40+lts per day. Either way optimax is crap and thats all it is. Optimax with 5% ethanol.
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Old 11-29-2005, 23:00   #10 (permalink)
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Re: New-100 Octane Optimax

Quote:
Originally Posted by brenx
Anything from shell I'm reluctant to run. I came unstuck today and had to run optimax as BP and Mobil have no 98ron. Bastard thing detonates if you give it a quick squirt. I'll be back on Mobil or BP ASAP.
Ive had similar problems with optimax, especially fouled plugs and soot on the rear bumper. Im told optimax contains detergents that like leaner burning modern fuel injected engines with big spark to combust hence why high HP/Compression carb engines may suffer. On Mobil 98 it runs crisp and clean without the slightest problem.
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