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This analysis is used to evaluate the level of cleanliness in mineral fuels, including B7 diesel, as well as, in those higher than B7, to determine vehicle manufacturer specifications and quality control.

The scale of values ​​that can be obtained with this Filter Blocking Tendency test (FBT) ranges from 1 to 100. The values ​​being equal to 1 or closer to this value, the fuels of the best quality and that will perform better against to the filters that are incorporated in the vehicles.