Is Dexcool Bad?

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In the 1990s, GM introduced an engine coolant called Dexcool. It's supposed to last 5 years or 150,000 miles, but there have been problems with this coolant. Cooling systems that use Dexcool exhibit more acid buildup and rust in the system when the coolant level gets low and oxygen is allowed to enter the system.

You may wonder, when did gm stop using dex-cool? GM postponed using Dex-Cool in Saturn cars until the 1997 model year because it did not have enough data to make use of the new coolant possible in 1996 models. Geo vehicles, built in conjunction with Suzuki and Toyota, use a different coolant.

Similarly one may ask, is dex-cool better than antifreeze? Are there advantages to Dex-Cool? Why did Chevy and GM make the change over to Dex-Cool? The idea was simple really Dex-Cool lasts longer than traditional antifreeze. In fact, most owners' manuals put the change interval at 5 years or 100,000 miles or even longer for Dex-Cool.

Besides above, what is the advantage of dexcool? ACDelco DEX-COOL® is an ethylene glycol based fluid that provides maintenance-free protection against freezing and boiling but also against corrosion. Extended coolant life, often for the whole life of the engine or vehicle, is obtained through the use of virtually non-depleting corrosion inhibitors.

Likewise, does dexcool eat aluminum? In addition to the specific composition and color of the two coolants, DEX-COOL is designed specifically to interact with aluminum engines. Unless a previous owner has used traditional green coolant in your vehicle, using DEX-COOL for an aluminum engine will help minimize corrosion.

Can I replace Dexcool with regular antifreeze?

If you want to change over to the traditional coolant from Dexcool (I would, I've gotten to see some of the damage it's done on fairly new vehicles) then you need to flush the system. How I've seen shops do this is to start the car up and let the engine run a bit to build the coolant pressure.

How often should Dex-Cool be changed?

No problems experienced with the cooling system and plenty of heat from the heater core. GM says that DEX-COOL is only good for five years / 150,000 miles before it must be changed out.

How long is Dex-cool good for?

five yearsZerex® DEX-COOL® Life 5/150 antifreeze coolant is the latest long life automotive engine coolant development from Valvoline. The patented* carboxylate formulation has a service life of up to five years or 150,000 miles.

Is all orange coolant Dexcool?

The color of healthy engine coolant is green (for ethylene glycol) or orange (for Dexcool). A rusty color indicates that the rust inhibitor in the coolant has broken down and it can no longer control rust and scale buildup.

Is Dex-Cool corrosive?

Ten years after General Motors began using Dex-Cool as an antifreeze in most of its cars and light trucks, GM car and truck owners continue to complain that the coolant corrodes and clogs radiators and radiator caps, erodes water pumps, rots radiator hoses, causes chronic overheating and engine damage while leading to ...

Can I use water instead of Dex-cool?

If you were to just use water rather than the coolant mixture, high temperatures inside the motor would easily boil that water and cause it to evaporate, meaning you'd quickly have no coolant at all and the engine would easily overheat.

Is Dex-cool pink or orange?

the OEM dexcool is pink, yes.

What vehicles use Dexcool?

Zerex Dex-Cool Antifreeze/Coolant is proven to maximize engine life in passenger cars and light trucks, and is approved for use in GM, Ford, Chrysler and SAAB vehicles with cooling systems that require an orange antifreeze with Organic Acid Technology (OAT).

What year did Chevy start using Dexcool?

1995Back in 1995, GM began to use “Dex-Cool” coolant in its vehicles; in fact, you may very well be driving a vehicle that uses Dex-Cool.

What kind of coolant does a Chevy Silverado take?

Prestone - DEX-COOL Antifreeze + Coolant: Orange, Extended Life, Concentrate, 1 Gallon (Part No. AF888)

What is compatible with Dex-cool?


ACDelco DEX-COOL® is compatible with most other coolants based on ethylene glycol. Exclusive use of ACDelco DEX-COOL® is however recommended for optimum corrosion protection and sludge control.

What color coolant does Chevy use?

Dex-Cool. Dex-Cool is the antifreeze recommended by General Motors, the company that makes Chevys, as the best antifreeze for their automobiles. It is an orange color, to truly differentiate it, and is an extended-life coolant, known to work up to 100,000 miles.

Is Dexcool Bad - What other sources say:

How bad is Dex-Cool really? | Bob Is The Oil Guy?

its only bad if not properly mantained. just change it every 5 years and youll be golden. oh and dont mix it with anything else.

Is DexCool bad - Rick's Free Auto Repair Advice?

So it's true that DexCool caused gasket leaks, but the real problem was incompatibility between the plastic and the coolant. Everyone assumes ...

Is GM Dex Coolant really bad? | GM Inside News Forum?

Dexcool is just fine for my cars. I change it every two years with a drain and rinse and rinse and then fill. The zillasport link above has it ...

Is Dexcool really that bad, still? : r/MechanicAdvice - Reddit?

DexCool can sludge if you let the system run low on coolant. If you keep it filled, it's fine. The old green coolant is a silicate/phosphate ...

Keeping Dexcool or not? - Maintenance/Repairs?

That looks bad. How much should I expect to pay to have a shop exchange the coolant for me?

Dexcool coolant not good? Deathcool? Orange kiss of death?

Since the newer Dexcool being produced now has a 5 year life rating, there have been no issues with it that I have seen. Yet the rumors saying " ...

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