what thermostat should i run?

[19mustang65]

im running a 185 degree thermo in my 302 and im getting about 14.5 miles per gallon both freeway and city driving. i was told today by a guy that i should go with a lower one like a 160 and i could pick up a couple miles to the gallon, he was kinda a trashy guy so im not sure weither to follow is suggestion or to stick with what i have. if i went lower would it give me better mpg, but at the same time cut down my hp? what are my option...pros and cons? thanks

 

[Ronstang]

The thermostat determines how fast your car warms up, not the temp it runs at unless that temp is lower than the thermostat ratng and it keeps cycling. If your car runs hotter than 185 under normal conditions you should stick with what you have.

 

[19mustang65]

my car runs at 185 in most all conditions unless idleing in traffic and 100 degree weather.

 

[Ronstang]

I don't see any reason to change what you have.

 

[19mustang65]

hmmm...darn...i was getting hopful of better gas mileage

 

[Great68]

I can't imagine how you'd get increased mileage by going to 160 degree. In fact you'd most likely get WORSE mileage because your motor is not running very efficient.

 

[19mustang65]

im glad i asked for more opinions on this before changing my thermo.

 

[Hack]

A couple things I've read about engine operating temperature.

The rate of cylinder wall wear DECREASES as you increase the operating temperature.

Carbon and oil residue will also build up faster in an engine that operates cold.

 

[Carizzma]

Keep the one you have.

 

[WORTH]

hmmm...darn...i was getting hopful of better gas mileage

In reality it will run more effeciently hotter, not cooler. Your buddy has been snorting out of the wrong nostril.