johnrichard

my 2008 corvette has 15000 miles antifreeze is original from factory is it okay still looks good or should I have it flushed and replaced ?

Racer86

Good for 100k

moose.b3

Time for new anti-freeze. My understanding is it starts to lose the ability to lubricate after 5 years.

EVRose

Just get it changed. Its not expensive.

RICH 28

You are already 2 years past due. Very easy to change it yourself.

Rebel Yell

Yep, time for a change. Manual calls for a change at five years. At around 100 bucks (in my area) it's cheap protection.

RJRSW

GM manual says five years or 150,000 miles.

Your manuals that came with the car will have your answers and will base it on mileage or time whichever comes first for all required services. If you run it for over 5 years it loosed its capability to prevent damage to the cooling system, especially the radiator and water pump.

My 2007 had the flush and refill done at the dealer at 5 years and 6,500 miles and it is critical to be done correctly to insure that there are no air bubbles that can cause the car to overheat. The dealer spent an extra half hour making sure that the car cooling system was air free. They also add an anti corrosion additive with the new coolant.

That is what I use to determine when I need to do any single service item.

From my 2007 manual:

Engine Coolant
The cooling system in your vehicle is filled with
DEX-COOL® engine coolant. This coolant is
designed to remain in your vehicle for five years or
150,000 miles (240 000 km), whichever occurs
first, if you add only DEX-COOL® extended
life coolant.

wayback

5 tears only applies when you pay the Dealer to do it.

jovette

ruxvette

It may still look good but the additives wear out with age.

biker1059

Had mine done earlier this year. I have an 06 with at the time had 10k miles on it. Had a dealer flush the system when it was in for some other work. Coolant looks alot better than it did before the flush

Rebel Yell

Well I have this problem you see...........

It's the compooters fault, yeah that's it.........

Don-Vette

Going to have my 10' GS done in the spring.

HEB

Just has my 09 coolant changed with Dex-Cool at 9500 miles for about $100 bucks.

Rogers 07

I will change anyones coolant (Corvettes for a $100 bucks) It will include new Dex Cool anti freeze, draining and flushing the old coolant, Disposal of the old coolant and your choice of a cup of Coffee or a Beer while you wait !!

tabing

How many gallons for LS2 engine?

jrose7004

I'd replace it.

Rogers 07

One gallon, fill the rest with clean potable water.

Vet Interested

I just did my 2010 this morning. Drain and refill. Very easy. Took about an hour. Bought a gallon of straight Dextol and 1 gallon of distilled water. Cost under $30.

HOXXOH

The GM 5 year/150,000 mile recommendation is based on the national average of 12,500 mile/yr usage. It accounts for expected heating and cooling cycles and loss of additives during the running time required to acquire that mileage.
Since there is no expiration date on the containers, it's logical that age alone will not create a loss of the additives.
Nearly all maintenance recommendations are based on the expected half-life of the products, since the average car owner tends to go beyond the recommendation anyway and it gives the mfg an out for any warranty issues.

So, just change it when you feel that it gives you the warm fuzzies.