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I have been reading all the posts about changing coolant I would like to change the coolant in my 98 SLS this weekend .I will buy DEX-COOL if I can find it about how many gallons will I need plus distilled water and coolant tablets.Thank you SEVILLE 85
 

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2010 DTS
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One gallon of each might leave you a little short so buy 2 of each. That'll make 4 gallons and you'll surely have some left. One packet of tabs (6) will do. Use 4-6. Manual says 3, former guru said 6, I used 4.
 

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2015 Mazda3 S GT Hatchback 2013 Kia Optima SXL
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When I replaced the coolant in my SLS, It used about 1.5 gallons of new mix. That includes refilling the surge tank. That is all that came out. The entire system holds about 2.5 gallons, so more than half was replaced. According to our past guru, that is plenty for replenishing the protection additives that are in the coolant. I use 6 tabs of the bars leak. You can find the GM stuff at your local dealer. It isn't as expensive as you would think.

Don
 
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