2006 Mazda RX-8 — coolant is old by age but mileage is low

Intermittent stuff lies if you only catch it once. Loaded-suspension checks on the 2006 Mazda RX-8 catch play that a wheels-hanging inspection misses. If the cheap test changes it, stop and reassess. On “8 — coolant is old by age,” that was the fork that mattered for me. This is from a 2006 Mazda RX-8 in Tampa with 163,000 miles. Write the result down so the next test isn't a repeat of the last one. This is the version I'd tell a friend.

I wouldn't throw parts yet. A pressure test beats staring at a dry driveway if the 2006 Mazda RX-8 is losing coolant with no puddle. If the cheap test changes it, stop and reassess. Not gospel, but it saved me a headache. This is the version I'd tell a friend.

I'd want a measurement, not a hunch. Move a coil or plug on the 2006 Mazda RX-8 if it's cylinder-specific and see whether the code follows. If the cheap test changes it, stop and reassess. When does it actually happen? I keep a notes app thread for this now.

If it were in my driveway, a pressure test beats staring at a dry driveway if the 2006 Mazda RX-8 is losing coolant with no puddle. Don't erase codes until someone who can help has seen them. I'd want a dollar figure or a measured spec, not 'should be fine.' Not trying to scare you — just skip the expensive first guess. I keep a notes app thread for this now.

Log the conditions before you spend. Two 2006 Mazda RX-8s can feel identical and have different causes, so measure before you copy someone else's repair. That's the branch I'd chase this week. On “8 — coolant is old by age,” that was the fork that mattered for me. Had a similar mess a couple years ago and that's what finally sorted it. This is the version I'd tell a friend.