Losing Radiator Fluid No Leak - Brightlocal News
It's the most common reason that coolant burns off. It's also one of the most straightforward problems to spot. All you need to do is look at the exhaust smoke while the engine is running.
If you've looked at the exhaust smoke and still can't tell if you have a blown head gasket or not, then take a look at the oil. Simply pull the dipstick and see if the oil level is rising over time. When you get coolant in the combustion chamber, it do.