SMALL-ENGINE COOLING
Penray’s Pencool 3500 Small Engine Cooling System Treatment with Stabil-Aid is said to be the first coolant
maintenance additive designed exclusively for smaller engines such as refrigerator units, diesel pickups, small
delivery vans, and generators.
It helps prevent liner and block pitting, eliminates plugging of cooling system passages, inhibits insulating
mineral scale deposit, helps prevent premature water pump failure, extends antifreeze life, stabilizes antifreeze
and overdosed additives, and protects all six metals commonly found in cooling systems. It also contains
ethylene glycol so it doesn’t alter the freeze point.
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