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I chickened out and drilled 3 or 4 holes in it with a half inch bit when I did it, but nothing else afterwards. Since low rpms don't burn much gas, P&G burns even less and EOC burns zero, there's less heat being generated in there than under normal operation.
Watching the temps can get a little scary, but I never saw it get past 213/214 degrees. The thermostat seems to start opening in the 177-179 range, and the fan seems to come on around 192-195. Maybe around 212 the fan ups its speed or something. But in my climate, on my roads, under my traffic conditions and with my driving style, it never created a problem.
It looks like my second year with the car will be 1.5 mpg higher than the first year- 10 months of that with the grille block.
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Quote:
Originally Posted by sheepdog44
Transmission type Efficiency
Manual neutral engine off.100% @∞MPG <----- Fun Fact.
Manual 1:1 gear ratio .......98%
CVT belt ............................88%
Automatic .........................86%
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