The biggest pros of GM's Vortec engines are their longevity, performance and efficiency. The biggest cons come from their oil consumption and use of AFM. In their later years, Vortec engines have fallen victim to some downsides, like Active Fuel Management, an aggressive thirst for oil, and engine knocking. But back when they were brand-new, these engines were praised for their high-flow cylinder head... [4090 chars]
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