I found this on the web and thought it might "put to bed "
some of the dicussion on extended use antifreeze.

Coolant Symposium
One of the highlights of the convention program was MACS’s first-ever coolant symposium. Panel members included representatives from OEM vehicle manufacturers, cooling parts suppliers and antifreeze suppliers.

The panel’s conclusion was that consumers may be neglecting proper maintenance of their engine cooling systems. Coolant system maintenance and change intervals are not being adhered to resulting in major problems for many vehicles. Shops should therefore make it a priority to take care of "cooling system management."

Engine cooling systems that contain air (from improper bleeding procedures or not maintaining the coolant level), can contribute to the breakdown of the coolant and cause corrosion and erosion inside the cooling system (which is often mistakenly thought to be caused by electrolysis). While electrolysis can be the cause of heater core failures, actual cases are rare, said panel members. Improper grounding of aftermarket electrical equipment such as sound systems can cause electrolysis.

The panel also recommended that different types of coolants (conventional green antifreeze and orange long-life antifreeze) not be mixed. The additive packages are incompatible and can reduce the coolant’s ability to inhibit corrosion.

When adding new antifreeze to a cooling system, the panel said to use a 50/50 mixture of the type of coolant specified by the vehicle manufacturer mixed with pure distilled water. The panel also recommended using a refractometer rather than a hydrometer to test the strength of the coolant because a refractometer is more accurate

 

Thanks for sharing..... :thumbs:

 

Here's more than anyone should ever want to know about cooling systems.
http://www.imcool.com/

 

I have heard controversy over whether or not to use Dexcool...I have an 86 Vette coupe and am getting ready to flush and refill the cooling system...does dexcool cool better??? Are there any other advantages/disadvantages of dexcool???

Thanks

 

Thanks for the post. Ipulled my radiator and flushed it ,Iused Dexcool,should have used the green stuff cools better. :steering:

 

Unless you have been using DEXCOOL all along, then DO NOT begin using it now without absolutely, positively flushing all (every bit) of the green stuff out.

It doesn't cool or protect any better. It will protect longer, some say up to 100K miles. Since you should be pulling your radiator to clean it every year or 2 you would never have enough miles to make it worthwhile.

 

Too bad nothing else on the car last a 100,000 miles!
Dex-cool is junk & your rite no mixing of green & orange.

RV :steering: