Compatible with hoat (orange) coolant?

Yes. With all coolents actually.

How much will a 12 once bottle treat? I have a 5 gallon system and will be adding it to used coolant.

First of all I would flush & refill your coolant. I recommend Prestone 50/50 Extended Life even if your vehicle calls for Dex-Cool. Go to any place that does coolant flushes. Used coolant will not get the same results. In new coolant, the results will vary. Water Wetter will be pushed to it's limits but will still work in a 5 gallon system. The temperatures might not drop enough if stretched out that far in a large system to condone the price paid. If anything does work in this category though, it is either Water Wetter or Royal Purple's Purple Ice.

Do I add this to the reservoir or the radiator?

Add it to the radiator, if you can.

Can I use this with just distilled water in the winter without using antifreeze?

I have tested the water wetter at a ratio of 12 oz of to 116 oz of distilled water. i buried the gallon jug halfway deep in the snow and came out and checked the next morning early and the mix was still fluid. test this for yourself.

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RED LINE (レッドライン) WATER WETTER 12oz (355ml) (並行輸入品) 80204

RED LINE (レッドライン) WATER WETTER 12oz (355ml) (並行輸入品) 80204

Product ID: 733386434

Details

パッケージ情報
ボトル
ブランド
Red Line
商品の重量
340 グラム
材質
アルミニウム
液体容量
0.34 リットル

💧ultra-low viscosity

🔥2.5x heat conductivity

⚙️12oz per 12-16L coolant

Description

💧 Stay cool, drive smarter — Red Line Water Wetter keeps your engine chill under pressure!

TRUSTED BY ENTHUSIASTS - Highly rated with 4.6 stars from over 3,000 reviews—feel the difference on every drive.
LIGHTWEIGHT DURABLE PACKAGING - Sleek 340g aluminum bottle designed for easy handling and long shelf life.
SUPERCHARGED COOLING EFFICIENCY - Boost your engine’s heat dissipation by 2.5x with ultra-low viscosity formula.
COMPATIBLE WITH STANDARD RADIATORS - Enhances cooling without needing specialized hardware—upgrade your stock system.
PRECISION DOSAGE FOR OPTIMAL PERFORMANCE - Just 12oz treats up to 16L of coolant for maximum thermal control.

Red Line Water Wetter is a premium coolant additive that reduces coolant viscosity and improves heat transfer by over 2.5 times, enabling more efficient engine cooling. Designed for use with 12-16 liters of water-based coolant, this 12oz aluminum bottle additive is perfect for standard radiators and is highly rated by users for noticeable temperature drops and enhanced engine performance.

Specifications

ASIN	B000CPI5ZK
Amazon 売れ筋ランキング	車＆バイク - 182,743位 ( 車＆バイクの売れ筋ランキングを見る ) 車用エンジンオイル - 767位
GTIN (Global Trade Identification Number)	00083522802048
UPC	083522802048 172303062310
おすすめ度	4.6 5つ星のうち4.6 (3,088) var
ブランド名	Red Line
メーカー名	レッドライン
メーカー型番	80204
上位温度定格	60 摂氏
同梱商品	Red Line (80204) ウォーターウェッター - クーラント添加剤 - 12オンスボトル
品番・型番	RED80204
商品の推奨用途	ホーム
商品の用途	温度
商品の重量	340 グラム
容器の種類	ボトル
引火点	149 摂氏
液体の容量	0.34 リットル
素材	アルミニウム

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