Questions for folks who block their grill.

[firsthonda]

What sections of the upper and or lower grill do you block? Do you block any portion in the summertime? Has blocking your grill made a measurable impact on mpg?

[Jayemtee]

On the top half of the grill, I left the lower right section open. On the lower half of the grill, I left the lower left third of the area open. I wanted the side with the CVT to have airflow, and with a little bit of the upper right open, I felt it kinda balanced out the cooling of the radiator.

I removed it all when the lows in the morning were over 50.

I monitored the water temp with scangauge and the car warmed up quicker and never overheated. I consistently got over 50mpg per tank with or without the block.

[firsthonda]

So no fuel savings then?

[Jayemtee]

I didn't have enough data to establish a firm decision on fuel savings. I wouldn't be surprised if I got an extra mile or two per gallon in the winter.

I think coming up temp quicker is good for the engine and good for me using the heater.

I would not recommend it without a scangauge to monitor water temp. With so little left open, if you caught a plastic bag on the road that blocked the open area, you'd want to know about it before the idiot light comes on.

[Cobb]

You can safely block the lower grill half way with no problems. The top grill I leave untouched.

In the winter I completely block the lower grill. I find the i2 likes to be 180 degrees or below. Anything over that hurts vs help fuel economy. It wont pull the higher timing that it does at lower temps. I also use water wetter too.