| These types of additives contain polymers, which thicken the oil. Because the oil is now thicker, it will accumulate where a 'tired' piston ring stops tightness. |
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| Therefore, oil pressure rises, indicating a slow-down of circulation through the lubrication circuit &, consequently, considerably reducing the lubrication efficacy & a reduction in thermal evacuation. |
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| Cold starts are not aided, because it takes longer to establish the necessary viscosity of the lubricant. |
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| As 70% of engine wear occurs during cold starts, the wear factor increases with the use of such
additives, because these slow down the oil circulation
in the lubrication channels. |
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