How is it that Prestone can make an AMAM antifreeze that's good for 10 years/300k miles but makes an auto specific antifreeze that's good for 5 years/150k miles. An AMAM AF supposedly has less inhibitors making it safe to use in all vehicles. Do they have some magic additives ?
Prestone Antifreeze
- Thread starter Warstud
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5/150 matches the OE intervals,but I would never use it except maybe on a Ford that came with it from the factory, or maybe a GM car.
That Cor-guard 10/300 is Motorcraft New Yellow at half the price.
That Cor-guard 10/300 is Motorcraft New Yellow at half the price.
its a jumbled soup. Why does each manufacturer have 3-4 that arent interchangeable when there is prestone AMAM that works with anything?
That ford chart that has been posted here previously, even Jeep has pink, purple, orange, and green if you go back far enough.
That ford chart that has been posted here previously, even Jeep has pink, purple, orange, and green if you go back far enough.
No magic additives imo, just marketing most likely. I'm sure they have good data on how long coolant can actually last from their long term testing. I would guess that plenty of vehicles make it to the junkyard after a full life with at least a little factory fill in them. A lot of vehicles don't see coolant changes until it leaks out or there's a component failure...
Back when silicatated coolant was common, wasn't it important to drain/flush before the silicates came out of suspension? Like this?
Certainly back then, Prestone was recommending a yearly flush and fill. I'm pretty sure that flushing it out and bringing it back up with concentrated coolant was recommended.
That was the high silicate, likely used with tap water. If you didn’t change it regularly, bad things happened. Doesn’t seem to happen with modern coolant, distilled water, & aluminum radiators.Back when silicatated coolant was common, wasn't it important to drain/flush before the silicates came out of suspension? Like this?
Certainly back then, Prestone was recommending a yearly flush and fill. I'm pretty sure that flushing it out and bringing it back up with concentrated coolant was recommended.
I do remember initial Dex-Cool was used across all GM cooling systems. Even those with cast iron blocks. I've heard rumors of the block rusting before the inhibitors started working. But silicates work really quickly. So do phosphates. I seem to recall that traditional Prestone was high-silicate, high phosphate. That was different than typical Japanese coolants which were zero-silicate but high phosphate, like Honda Type 1.
Well that does it. Run the original fluid for five or 10 years, change a water pump and put in Prestone Platinum and you’re good for a total of 15 to 20 years, much longer than most people own their cars. Pretty bold move by Prestone.
I still see the Prestone 5 year Dexcool on display. I guess it’s all about making the consumer reach for your jug.
I still see the Prestone 5 year Dexcool on display. I guess it’s all about making the consumer reach for your jug.
You might be on to something. There going by statistics rather than the actual life of the coolant.
Here's the catch. On the front it says it's good for 10 years/300k miles. On the back it says to check the vehicles owners manual and change according to manufactures fluid interval, which is probably 5 years.
It's just like engine oil, you have 20,000 mi engine oil, but you can't use it if your vehicle is under warranty. Or obviously you will void it. Then again I personally think, engine oil isn't going to last no 20,000 miles.
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