Rare Earth Oxides (REO) Standard

Marsoni

M251S

$4613.11

Get it in 3 business days with 1 day shipping. Friday, May 29

Rare Earth Oxides (REO) StandardWHEN NOT IN USE, THE STANDARD SHOULD BE STORED UNDER VACUUM OR IN A SUITABLE DESICCATOR IN A TEMPURATURE CONTROLLED ENVIRONMENT Containing a set of REO Glasses: 1x All REOs at 0. 5% each, 3x REOs at 4% each, 1x REE free Glass. A 150m Molybdenum Faraday Cup is also included for measuring the stability of the electron beam.

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Note: there are no English instructions. I wanted this cleaning agent to disperse throughout the nooks and crannies of the engine, so about ten minutes before arriving at the mechanic's shop for my oil change appointment, I pulled the car over and poured this into the engine, then drove it the rest of the way there. The mechanic reported lots of sludge drained out with the oil. The engine seems to perform and sound better, as if it's not working as hard.

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Reviewed in the United States on February 15, 2026

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Andres Moreno

Waukegan, US

★★★★★ 4

Buen producto

Buen producto, limpia perfectamente el motor interno y se libera la suciedad en el cambio de aceite. no use todo el contenido, creo que es bueno usarlo en 2 cambios de aceite para una mayor eficiencia.

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Reviewed in the United States on March 29, 2026

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Lee Nunn

Carnegie, US

★★★★★ 5

Great will use it over and over again

I will use this in every car I own from now. Cleaned it real well did exactly what it said so and my truck runs a lot better definitely can tell the difference.. it was work the extra oil and work. The bottle I bought came with instructions in English, which made it easy for me. The quality of it is light brake cleaner, but meant for engines and it ran great very easy to use this pour in.

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Reviewed in the United States on October 19, 2025

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Beni

Lake Worth, US

★★★★★ 5

Does its job.

Always a go to before oil changes. Helps remove some extra sludge/deposits. DO NOT DRIVE OR REV THE VEHICLE WHEN USNG THE PRODUCT, only idle for 10-15 min. Ive seen reviews where people drove with it potentially ruining the engine.

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Reviewed in the United States on March 26, 2026

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Adan Ichich

Charlottesville, US

★★★★★ 5

Calidad de limpieza al motor

Excelente producto, lo llevo usándolo un buen tiempo, en cada cambio de aceite, limpia bien por dentro del motor. Es fácil usarlo, hecharlo donde se llena el aceite del motor, y enciende el motor espere 10 minutos, y apague el motor, y vuelve a esperar 25 o 30 minutos para que se enfríe el motor, ya cumplido lo 25 o 30 minutos sacar el aceite viejo del motor. Listo, producto muy recomendable. Excelente funcionamiento, chevy silverado 2004

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Reviewed in the United States on March 15, 2026