Antifreeze for the Honda Civic
The Civic reaches Georgia in both US and Japanese versions, from the older R18 to the turbocharged L15B7. The specification is the same across all of them: a blue, silicate-free, phosphated Type 2. Honda's manual prohibits mixing outright.
Photographs come from the manufacturer's official materials.
Cooling system volume (litres) roughly five to six litres
The turbocharged 1.5 and its known weak point
The current Civic's L15B7 is a direct-injection turbo engine and runs hotter than the naturally aspirated R18. The thermostat opens later and the cylinder head works in a hotter zone.
That zone is exactly what ASTM D4340, the hot-surface corrosion test, examines. Valvoline Zerex Asian Blue returns 0.1 mg/cm²/week against a limit of 1.0, a tenth of the permitted loss.
If the car does mostly short trips and the engine never fully warms, the fluid degrades sooner. On that duty cycle, do not run the five-year interval to its end.
Honda's two rules apply to the Civic as well
Dilute before filling. Our product is a concentrate, and Honda states plainly that neither neat concentrate nor plain water goes into the system. Mix 50/50 in a separate container first, then fill.
Do not mix. Green Type 1, pink, orange and yellow universal fluids do not belong with blue Type 2. If you do not know what is in the system, flush it.
A Civic system holds five to six litres, so one bottle of concentrate covers a full fill with some left over.