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Suzuki MX & Off-Road Dirt Bikes
Lucas Octane booster?
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[QUOTE="Rich Rohrich, post: 1403249, member: 16241"] If you look at the Lucas MSDS sheet for the product you'll see that the product is MMT based. MMT = Methylcyclopentadienyl Manganese Tricarbonyl It's an organmetallic fuel additive used to replace lead and raise octane (mainly RON). This is important because two-strokes usually need and increase in MON to squelch knock. MMT has zealots both for and against it. As far as I know it isn't used in pump fuel anywhere in the US, but I believe it is used in parts of Canada. The metallic deposits tend to shorten plug and oxygen sensor life, so in a world of 100,000 mile tune up expectations it's unlikely you'll ever see it in US pump fuel. MMT tends to be less effective at boosting octane as the percentage used increases, and the deposits get much worse as the percentages increase. So it's definitely a case where more is NOT better. If you look closely at the pictures attached you'll see the electrode edges are really sharp on the plugs even though the deposits are fairly heavy. All those deposits were built up in just over an hour, running about 2 oz/gallon of high percentage MMT based octane booster in a YZF four-stroke that was jetted sharp. It's actually a pretty good additive if all you want to do is add a few octane points protect your engine from knocking in a pinch, but it generally makes tuning a total nightmare, and comes with some significant side effects on a two-stroke. Reading plugs with this in the fuel is next to impossible. In a two-stroke the deposits can easily lead to hot spots in the combustion chamber increasing the chance of pre-ignition. Here's a thread that has some info on a couple of boosters I tested with for reference: [url]http://www.dirtrider.net/forums3/showthread.php?threadid=15450&referrerid=16241[/url] You would be much better served adding a small percentage of leaded race fuel or even AvGas to your premium pump fuel to raise the octane rather than using an additive like this. [/QUOTE]
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Suzuki MX & Off-Road Dirt Bikes
Lucas Octane booster?
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