Over 40% of all diesel engine downtime is coolant-related, says Joe Long, director of sales-Power Fleet Div. at Penray Companies. “Today’s advanced en­gine technologies can be more susceptible to premature failure and damage from contaminated or substan­dard coolant. An understanding of the differences in cool­ants may help reduce cooling system fail­ures that could lead to premature engine wear and failure,” he says. Modern heavy-duty engines ...

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