From a Road and Track article:
"The source of the Z's strength is also unfortunately its weakness. The VQ37VHR engine feels like it's reached the limits of its evolution, largely due to its character in the upper half of its rpm range but also because of its propensity for heat generation. Nissan strongly recommends its special Ester-based engine oil blend for reasons of compatibility on a chemical level with the slippery Diamond-Like Coating (DLC) that covers and protects various high-friction internal parts."
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