Aluminum Block V8s 4.1, 4.5, 4.6, and 4.9 liter engines.

Best/Correct coolant to use..

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Old Sep 1, 2016 | 11:11 AM
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Question Best/Correct coolant to use..

Going to flush the coolant on my 99 Eldorado. What is the correct coolant to use? The GM Dexcool or the regular green Prestone? I know it needs 50/50 also but can a guy run like 60/40 being up here in Wisconsin winters? Good advice is appreciated...Thanks
 
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