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Burg Boxster · 05-06-2011, 07:28 AM

The correct coolant ratio is 50/50 coolant/DISTILLED water for maximum temperature effectiveness.

For future ref, if all you needed was to top off, you could just use DISTILLED water. The cooling system holds ~ 5 gals (20 qts) so even adding a qt or two won't throw off the mix balance much. Likewise, you could just add coolant if only a quart or two is needed.

Good luck

05-06-2011, 07:28 AM	#2
Burg Boxster Registered User Join Date: Nov 2006 Location: In the garage... Posts: 1,736	The correct coolant ratio is 50/50 coolant/DISTILLED water for maximum temperature effectiveness. For future ref, if all you needed was to top off, you could just use DISTILLED water. The cooling system holds ~ 5 gals (20 qts) so even adding a qt or two won't throw off the mix balance much. Likewise, you could just add coolant if only a quart or two is needed. Good luck Last edited by Burg Boxster; 05-06-2011 at 07:32 AM.