The situation is complicated. We don't live together and 2 years ago after telling the gf repeatedly we couldn't afford a car she got a second hand one behind my back with repayments supposedly to be made by her daughter. I vowed not to put any money into it. But recently the daughter reneged on the deal and we've become dependent on the car to get the granddaughter we're raising to school.
The car had about 35k on the clock and we are now at 70k. I remember her occasionally putting water in the radiator... and then she didn't. So last week the engine overheating light came on, smell of burning, steam, etc. Then she filled it up with water again. That's when I looked in the manual. My last car was a used Cortina in the 70s and in those days you just used plain water. Antifreeze was for winter, so this is all new to me.
We had the same problem with oil. She never checked it or changed it (magical thinking) and we had warning lights come on one day - luckily close to home. After reading about the damage that can do I've insisted on having proper oil changes at B-Quik. They usually check a whole bunch of things. I had to pay for new brake pads and rear shocks this year but they haven't mentioned coolant so far.
I suppose I'll have to ask them how much coolant flushing would cost.