Easy to answer question, but it's better safe than sorry with a rotary. I need more coolant so I was wondering if any coolant is ok. I know with my Volkswagon it needs certain type of coolant for it to work. So I'm wondering if the rotary needs any special type of coolant, or will anything I can find at Walmart or Kragen good enough.

thx

 

Regular old ethylene glycol. Never use the red stuff as it tends to eat the o-rings...