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  • Superior Cold-Start Engine Protection Play Video
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    Superior Cold-Start Engine Protection

    AMSOIL Signature Series went head-to-head against other brands for cold-flow capability – and came out on top.
  • All You Need to Know About Oil Cold Flow Play Video
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    All You Need to Know About Oil Cold Flow

    Most engine wear occurs at startup. Here's how to protect your engine.
  • Superior Diesel Cold-Temperature Protection
    DieselProduct Highlights

    Superior Diesel Cold-Temperature Protection

  • What Motor Oil is Best for Winter? (And Other Cold-Weather Questions) Play Video
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    What Motor Oil is Best for Winter? (And Other Cold-Weather Questions)

    Synthetics remain fluid in cold weather to ease cold starts and improve wear protection.

    • What Does Oil Viscosity Mean

    Oil viscosity is the measure of its resistance to flow. How quickly or slowly motor oil flows affects how well it protects your engine.

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