The 2.3 eco boost has nothing in common with the old 2.3 Lima engine except displacement.I found the fuel economy difference is stark between high RPM/low boost and low RPM/high boost. I haven't used 6th since I put 35s on.
Additionally, the non turbo versions of this engine often spun 3500+ on the freeway in top gear in the economy cars they came in. They can take it.
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