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Old 04-08-2019, 02:50 PM   #228 (permalink)
EcoModding Lurker
Join Date: Oct 2018
Location: Colorado
Posts: 9

Sunny - '02 Honda Insight
90 day: 67.41 mpg (US)
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Why not continue running 4.6 qts (or whatever stock capacity is)? Should still be plenty of oil for lubrication and assuming you're not uncovering the oil pickup, keeping the oil further from the spinning components should reduce windage friction losses.
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