Thread: Groovy heads
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Old 02-14-2013, 09:29 AM   #7 (permalink)
Runs with scissors
Join Date: Jan 2013
Location: Illinois
Posts: 89

Spot - '05 Scion XA
90 day: 30.33 mpg (US)
Thanks: 7
Thanked 30 Times in 22 Posts
more power and fuel savings of up to 42.5 percent

It's the truth. Those sharp edges set you up for the worst pre-ignition detonation known in the history of engine-kind, forcing the intrepid groover of all things combustion to drive like a veteran hypermiler.
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