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If this is a repost sorry and could you plz post the topic that has been already made. anyways ive been looking at my coolant and noticed it was low after doin the tb coolant bypass. i was wondering wat type of coolant i should use on my 05 civic ex. i have 50/50 laying around. would that work?

 
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premixed should be ok, I played it safe and bought Honda

 
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its in the manual. i cant remember the top off my head cause i been changing coolant on 3 diff cars within the month and dont want to give you a mixed answer.

but im sure its 50/50 or those premixed would work.

 
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honda premixed.

 
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how much do those cost around?

 
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by my dealer it was like.... almost $20! I think the non Honda ones are probably half the cost.

 
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super street did a article in the March 2002 on the cooling system and recomended a waterless coolant called Evans' NPG coolant

http://www.evanscooling.com/catalog/C_npg1.htm

Evans NPG+ Waterless Coolant is the recommended coolant for all gasoline and diesel engines. NPG+ is a stand-alone lifetime coolant that does not freeze, or boil over. NPG+ controls detonation, cavitation, and is non-corrosive. Installing NPG+ requires the radiator, engine block and heater core to be drained completely and then filled 100% with NPG+. A free test strip is included with purchase as a guide to successful conversion.

Evans NPG+ waterless coolant is a blend of glycols. Evans NPG Coolant is 100% inhibited Propylene Glycol. Both can maintain a substantially vapor-free, liquid-to-metal contact at all coolant temperatures and engine loads. By bathing the entire combustion chamber with coolant 100% of the time, metal temperatures are controlled to such an extent that critical levels of detonation and pre-ignition are never reached. Because of the naturally high boiling point of NPG+ / NPG / NPG-R (375°F / 370°F / 400°F) , the need for adding high pressure to the cooling system is eliminated. With low pressure (4 to 7 psi) in the system, gasket seals, hose connections, and even the radiator operate safer and longer.

 
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Honda Type II. This is the 50/50 premixed. You can also use Honda Type I which is the unmixed coolant.

 
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wat do they have in the radiator right now? dont want to mix 2 diff types of coolant/

 
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Honda type 2 is in there right now. But anything will work. Topping it off with staight coolant or just water is ok.

 
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i guess ill just pour in 50/50 then and it should b good right?