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xcbxer · 10-17-2010, 07:37 PM

OAT (Organic Acid Technology) long life/extended life coolants were originally orange. Later versions were green or yellow to indicate their semi-compatibility with green EG (ethylene glycol).

There's been a lot of bad press and law suits surrounding GM's DEX-COOL. GM engineers blamed, amongst other things, trapped air pockets left behind after a system flush.

Many OEM car brands now proliferate. Maybe that's nothing more than liquid badge engineering.

I miss the plain old green EG - just had to change it every 2 years. Meantime, I'll bend over for a $25 jug of Porsche antifreeze.

My 97 manual says the coolant is for the life of the engine. Is anybody flushing on a more regular basis?

10-17-2010, 07:37 PM	#8
xcbxer Registered User Join Date: Aug 2010 Location: Toronto Posts: 13	OAT (Organic Acid Technology) long life/extended life coolants were originally orange. Later versions were green or yellow to indicate their semi-compatibility with green EG (ethylene glycol). There's been a lot of bad press and law suits surrounding GM's DEX-COOL. GM engineers blamed, amongst other things, trapped air pockets left behind after a system flush. Many OEM car brands now proliferate. Maybe that's nothing more than liquid badge engineering. I miss the plain old green EG - just had to change it every 2 years. Meantime, I'll bend over for a $25 jug of Porsche antifreeze. My 97 manual says the coolant is for the life of the engine. Is anybody flushing on a more regular basis?