Hey Z QUALITY......interesting note you wrote about voiding warranties. You "indicated" that a full synthetic is required to not void the Nissan warranty, however, my Nissan dealer's normal oil change for my new Z is regular, non-synthetic oil. I have free oil changes for life as part of my purchase, but paid an upgrade difference for the Mobil 1. My dealer didn't even offer the Nissan, ester-based, synthetic oil everyone talks about. My dealer/service manager thought my whole conversation about oil was pretty silly.
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