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Old 03-04-2016, 06:04 PM   #1
robb_sc2
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Default Valvoline long life coolant

Did a coolant flush at the local iffy lube, after doing the water pump. Not sure why, they are the ones that broke my oil drain plug nut off inside the pan... Anyway, they used Valvoline longlife coolant. Didn't have a chance to ask if it is phosphate free ethylene glycol. The Valvoline website claims universal compatible, but they do list a dexcool specific replacement so now I'm nervous. Please calm my fears or confirm them!

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Gold 1999 SC2 ~385k Kms

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Old 03-04-2016, 07:22 PM   #2
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Default Re: Valvoline long life coolant

From the service manual; The Saturn cooling system is filled with DEX-COOL™, a non phosphate, silicate free ethylene glycol-based antifreeze recommended for aluminum engine protection and increased water pump seal life.

With all the discussions for and against coolant formulations and the harm caused from possible misuse of incorrect coolant, its more or less hearsay distracting the main reason major coolant manufacturers revise their formulas - to ensure their coolant is compatible with engines and materials to prevent chemical reactions, galvanic corrosion or conditions that would lead to cooling system damage. Since cast iron engines led to cast aluminum engines or aluminum cylinder heads and use of aluminum for heater cores, coolant formulas required changes to accommodate dissimilar metals from reacting with each other thru liquid coolant.

If you are sure Valvoline is used, visit Valvoline's site and read their coolant formula. They should be able to give you info about their compatibility to cooling systems.

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Old 03-04-2016, 09:11 PM   #3
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1998 SC2
Default Re: Valvoline long life coolant

Quote:
Originally Posted by robb_sc2 View Post
Did a coolant flush at the local iffy lube, after doing the water pump. Not sure why, they are the ones that broke my oil drain plug nut off inside the pan... Anyway, they used Valvoline longlife coolant. Didn't have a chance to ask if it is phosphate free ethylene glycol. The Valvoline website claims universal compatible, but they do list a dexcool specific replacement so now I'm nervous. Please calm my fears or confirm them!
The latest formulations are phosphate free and ethylene glycol based. The Valvoline product is all makes all models compatible. It should be perfectly fine.

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Old 03-07-2016, 02:39 PM   #4
hholbein
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1997 SW2
Default Re: Valvoline long life coolant

+1. Probably no worries for 5 years. For the past 10 years I've run Valvoline's Zerex G05 yellow coolant and it's been a champ @ 60%+ concentration. Much less scuzz in the expansion tank than I experienced with the original Orange Julius Dexcool stuff.

Still on my original radiator, water pump, hoses. Knock on plastic.

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