Now this mechanic thats been helping me out with basic maintanance told me something intresting.
He said that apparently "GM had more problems with this dexcool stuff than with plain old anti-freeze"
Mind you he is a little older, the guy has been working on cars for some 30+ years. I know things have changed since the times the dinosaurs roamed the earth. ( try shoving a live one down your gas tank he'd probably tell me ^.^ )
The point is I'm not quite sure if thats true and once again I'd like to ask the experts. To the people that drive the LD9, I ask you:
Does dexcool work better than the green stuff....or is my mechanic just losing his touch?
Thanks again
Hows it going daniel, Well Ive heard lots bad things as well about dex-cool coolant, I havent had a problem with my 2000 pickup, Its got 260,000 kms on it, I am running dex-cool coolant. Never had a head gasket or coolant problem yet, Also got 2001 cavalier wit 194,000 kms, on it, It has dex-cool, No problems yet. Like I say I just put dex cool into both of my cars cause it recommends it. If I had problems with using dex-cool I would change it then. My opinon if it hasnt failed you, Keep using it, If it has dont use it.
Good Luck.
rich weeks wrote:My opinon if it hasnt failed you, Keep using it, If it has dont use it.
All well and good, and I'm in a similar state of mind (my 97 Cavy is still running dexcool without issue). Seeing as how waiting for it to fail can be expensive, you might choose to heed the advice to change before problems occur. Just make sure you do a very thorough flushing.

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Never had a issue with dexcool, but most all antifreeze now is made to be complaint with dexcool, so it does not matter. If you read the bottle's it will say.
FU Tuning
John Higgins wrote:Never had a issue with dexcool, but most all antifreeze now is made to be complaint with dexcool, so it does not matter. If you read the bottle's it will say.
Or compliant, which would have the opposite meaning by just flipping two letters.

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Rich Grayo Jr. wrote:i'm partial to peak yellow myself, but i'll never run dex-cool.
x2
ive seen to many cases of mississippi mud.
I run dex in my bike..i dont mind it at all..but i do change it every year..
From what I've seen, Dexcool mainly seem to cause problems when openly exposed to air over time. In our cars, very little air is allowed into the system, as the overflow has the pressure cap on it. On some other models, they still use a conventional radiator cap, and the overflow tank is openly vented to the atmosphere. I had a 2003 Impala for a very short time, and the crud that was on the inside of that overflow bottle was incredible (Dexcrud?). That was 2 years ago, and the car only had about 105,000km on it. My 2002 Sunfire has 227,000km now, currently on its second fill of Dexcool. The original was changed out at 5 years (175,000km) and it looked perfectly fine and clear.
I've seen and heard about more issues from mixing other standard ethylene-glycol coolants into systems previously filled with Dexcool than what Dexcool has caused on its own. Personally, I'll stick with what the manufacturer has specified. If one day it proves to be troublesome, I may reconsider, but for now its still Dexcool. I just wouldn't put it into an older engine that's spent its lifetime with the "standard" stuff in there.
John
none of teh vehicles in my family have had a single Dex-cool related issue, including the K1500 with a 4.3L. I use it because I trust it. The cars that had failures blamed on Dex-cool still have the same failures with the green stuff in them.
John Benham wrote:
x2
ive seen to many cases of mississippi mud.
x3
Standard green all the way