Anyone running Exmark machines for a living knows that low-quality oils can fail when the going gets tough. In Exmark's case, we achieve longer oil life with what we have taken out of the formula. Common oils use Viscosity Index improvers that can break down, so we don't use them. Due to the high quality synthetic base stocks, the use of viscosity index improvers to achieve a multi-viscosity grade oil is not necessary—the result is a superior product with no viscosity loss due to polymer shear, like most other oils. This gives Exmark oil a very rare quality. Whether your engine requires SAE 30 or SAE 10W-30, Exmark Premium performs like no other.
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