A range of monograde engine oils designed for older automobiles and motorcycles where a non-detergent/dispersant and a low TBN lubricant is required for engines with less capable filtration systems. Using a non-detergent/dispersant lubricant in vehicles without a filtration system means that any dirt, debris, or sludge will drop into the engine sump and not recirculate where it could potentially damage critical components.

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