brakes drug

[SolaraHop]

I was wondering if my brakes drug - it's expencive thing to have with the cost of gas. So using non-contact IR thermometer I measured about
140-160F on front disks and 130-140F on rear after driving for 4-6 miles in city with speed about 40m/h with minimum brake use.
I'm registering about 25mpg in city doing conservating driving.
Have any one measured disk temp? What is your MPG in city?

[ThatVietGuy]

Those temps don't seem unreasonable, friction can create massive amounts of heat. Go to a road course/race track and run your car for 15 minutes and see how hot it gets then

And what is brake drag? I've never heard of that term before...

[PXLpainter]

^^ No - it's brakes drug

[SolaraHop]

Relationship between a dragging disc brake and reduced fuel economy.

By design, all disc brakes are self adjusting and therefore, they require no periodic readjusting to compensate for brake shoe wear. However, certain malfunctions may cause a disc brake to drag. This drag will reduce mpg and result in premature brake pad and rotor wear. It is critical for both safety and maximum fuel economy that disc brakes operate properly! It is important to note that any brake system on a given vehicle operates in the proper front to rear sequence and that the left and right sides operate in unison to avoid undue premature lockup or lateral forces.

[ThatVietGuy]

Relationship between a dragging disc brake and reduced fuel economy.

By design, all disc brakes are self adjusting and therefore, they require no periodic readjusting to compensate for brake shoe wear. However, certain malfunctions may cause a disc brake to drag. This drag will reduce mpg and result in premature brake pad and rotor wear. It is critical for both safety and maximum fuel economy that disc brakes operate properly! It is important to note that any brake system on a given vehicle operates in the proper front to rear sequence and that the left and right sides operate in unison to avoid undue premature lockup or lateral forces.

I've always just referred to that as a seize

Anyway, if your brakes are doing such a thing, you should notice if it's taking more effort to start from a dead stop. Not to mention a very distinct burning smell.

[ThatVietGuy]

^^ No - it's brakes drug

Drug, drag, past, present - whaaattteevverrrrr