I was under the assumption that is some sort of 'thermostat' so the oil stays at a somewhat consistent temperature. Maybe it doesn't get the same amount of airflow on an FB, therefore it benefits from having the pellet removed.
Thats my theory FWIW.
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1976 Mazda Cosmo RX-5
1976 Mazda Cosmo RX-5
2003 Toyota Tundra TRD
2015 Toyota 4Runner SR5
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