Today I flushed and changed the coolant. I do it every year and half religiously; what I can't figure is how much smoother the car runs after today! It didn't run bad before, just felt like the old car with 200k on it that it is. Kinda felt newish as I took it for spin to circulate and make sure all bubbles were out. Maybe every year would be even better? Anyone else ever have this experience?

I get the same feeling of improved performance, each time that I do an oil change.

The engine just seems to run so smoothly.

 

I think that it is all in the mind.

I get the same feeling of improved performance, each time that I do an oil change.

The engine just seems to run so smoothly.

 

I think that it is all in the mind.

 

You might be right. This seemed somewhat glaring to me in terms of a change that I wasn't looking for. I wonder if a sensor was washed and is a factor here.

It is best to change the (green) coolant every 2 years. Sooner is not going to hurt anything but it won't do any good either. The new long-life coolant (Subaru's is blue) is good for 5 years.

 

GD