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Daox · 10-27-2014, 10:02 AM

The Prius isn't that sensitive to heat. I run a full grill block in winter and fall/spring, and one upper grill slat open on it in summer with zero issues for years now. That being said, I'd highly recommend a grill block.

10-27-2014, 10:02 AM	#3 (permalink)
Daox Administrator Join Date: Dec 2007 Location: Germantown, WI Posts: 11,203 CM400E - '81 Honda CM400E 90 day: 51.49 mpg (US) Daox's Grey Prius - '04 Toyota Prius Team Toyota 90 day: 49.53 mpg (US) Daox's Insight - '00 Honda Insight 90 day: 64.33 mpg (US) Swarthy - '14 Mitsubishi Mirage DE Mitsubishi 90 day: 56.69 mpg (US) Daox's Volt - '13 Chevrolet Volt Thanks: 2,501 Thanked 2,588 Times in 1,555 Posts	The Prius isn't that sensitive to heat. I run a full grill block in winter and fall/spring, and one upper grill slat open on it in summer with zero issues for years now. That being said, I'd highly recommend a grill block. __________________ Current project: A better alternator delete