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Old 02-14-2017, 08:06 AM   #465 (permalink)
Ecky
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Join Date: Dec 2011
Location: New Zealand
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ND Miata - '15 Mazda MX-5 Special Package
90 day: 39.99 mpg (US)
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I did a slightly early oil change interval when I switched to Green Oil, and sent it in to Blackstone to get a baseline. Here's their report on Mobile 1 0w20 after 6,000 miles, with my engine at 219,500 miles:




I'm guessing magnesium is higher than average because that's what the oil pan is made of.
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