I agree, but good luck, I am in agriculture and the "corn lobby" is extraordinarily strong. They will get what they want 99% of the time. Alden
100LL isn't as high in lead content as you may think. Yes, it has a lot of lead in it and anyone who has picked lead balls out of the lower spark plugs of an aircraft engine can attest that it's not anywhere near "Low Lead", it's just lower than the old 100 octane Avgas. The fact is it has only a bit more lead in it than the old Sunoco 260 had, which just goes to show you how nasty really good gas was back in the day... With my old BMW 2002 I had a TISA head that we modified to match the 13:! Venolia pistons and Sunoco 260 was the only thing that kept it from preignigion... It would rattle a bit on Amoco, but the Amoco was unleaded... I've quit using ethanol laced gas in anything but newer cars. I've had issues with ethanol on lawn mowers (eating the tips off the float needles) and with the snowblower (fuel separation, even with a stabilizer), so none of my limited use motors get even e10 anymore...
260 GTX - Sunoco Race Fuels Sounds interesting. But, it is ~$12 / gal ! 98 Octane and no lead. Isn't 98 what's listed in the owners manuals? I see, "Premium Grade 98 - 100 O.N. with 4 or 5 stars" whatever that means ?? I've notice corrosion in the fuel system / carbs. I suspect from water drawn in by Alcohol.
No! You are confusing octane scales. Pump gasoline in the USA since the late 1970s combines both the Research Octane Number (RON) and the Motor Octane Number (MON). That average is (R+M)/2 also known as AKI (Anti-Knock Index) The rest of the world measures pump gasoline octane by the RON scale. So 98 RON outside the USA is equivalent to 93 (R+M)/2 as used in the USA. The octane of the Sunoco link you posted are as follows: (R+M)/2 = 98 (RON) = 103 (MON) = 93 Read the Measurement Methods and Regional Variations sections below. https://en.wikipedia.org/wiki/Octane_rating
Thank you! So 93 (AKI as used in the USA) is equivalent to the 98 (RON as used in Europe)? Good to know. A couple of things I do know about octane: 1. Octane is like shoe size. Too big does not help you run faster. 2. You can't determine the octane needed by just looking at the C.R. BTW - I've looked around for non alcohol fuel, and it seems just about impossible. I've seen some methods of getting rid of the alcohol, but sounds like a bad idea because of the obvious dangers dealing with gasoline, and if you remove the alcohol successfully, who knows what happens to the octane.
We can get etoh free 91 in my area. 93 is 91 with alcohol I was told. Also avilable at the pump 100 octane no lead 9 per cent alcohol. The 100 octane is around $8/gallon. Tried mixing it 1/2 and 1/2 with 91 and 2/3 91 and 1/3 100. Does not run any different than using the straight no etoh 91. My car is a 575M which of course is injected. No etoh makes a hugh difference on carbureted motors. Hopefully Trump wil have the 15% etoh mandate thrown out. GTS Bruce
