You should have coolant coming coming out of the reservoir only when you have grossly overheated the engine. Shouldn't happen unless you boil the coolant. The temperature where coolant boils depends on type, concentration, and system pressure. IIRC, it's somewhere around 230F for classic cars, but may be higher in modern vehicles.

It also overflows if you have grossly overfilled the tank way past the MAX mark like what my dad did in his car.

Congradulations on having a empty coolant tank. Your prize will soon be a rusted out radiator core. You need to get it topped off at the stealership a.s.a.p.

i check coolant level on my Z on a regular basis, and it's been 3yrs+ no need to add.

the coolant in the Z is some special formula they started using that is suppose to last like 7yrs or something without needing drain/fill.

According to Service Manual MA-8 and MA-9, note (4), the coolant filled at the factory is good for the first 60,000 miles or 48 months. Thereafter, replace every 30,000 miles or 24 months.

huh, that's odd. 4yrs is what my G has with the green fluid. and the drain/fill cycle you posted is what ive been doing on my G. (my G's 8yrs old).


my z came with blue coolant. specially formulated for longer duration so i thought i read. :confused: next time i see my Z i shall check the manual again.

Is this extended life coolant code named "FL22"? On my Rx8, the manual does say something about a factory-filled long life coolant that Mazda calls "FL22". The manual says you don't have to change your coolant for the first 48 months too. Thereafter, its once every 2 years. There are FL22 stickers on the radiator cap or on the reservoir tank to tell you its long-life coolant. Just a fancy code I guess... In reality, I think its just a 50-50 pre-mix.

anyway, mr.jar (member here) confirmed wat i read in the owner's manual. 7yrs or 105k miles for the first change. i forgot to look in the manual when i turned the tires a few weeks back. my car's in hibernation with cover on so kind of a hassle to pull out just the owner's manual from inside.