I had excellent Blackstone reports running Redline 5W-30 in my 2009 Z. However, the cost of the Redline went up quite a bit and I have been able to buy several 6 pack cartons of the Pennzoil Ultra (not the new Ultra Platinum) Euro Spec oil on Amazon.com for several dollars less per quart. It has performed comparably with the Redline in the Blackstone resports. Additionally, my consumption went down from about 1.25 quarts per 5000 miles to about a half quart between changes with the Ultra. Not sure why but I like it. The Nissan Ester oil is OK, but it needs to be about $6 per quart for what it is. You can do much better for the money.
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