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For the first time in memory, two grades of oil for diesel engines are on the market. Should you purchase the older CI-4 Plus, the newer CJ-4 for engines with 2007 emissions controls, or stock both?
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Equipment operating on highways and streets that have been treated with deicing chemicals is susceptible to rust and corrosion as never before.
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Beginning June 15, all on-road engines must use S15 diesel. Here's how this requirement will affect budgets, maintenance intervals, and performance.