Prestone All Vehicle vs Peak All Vehicle?

[wolf_walker78]

I looked at the respective web pages for these two and I don't see anything but consumer fluff.
Are they compatible? Long story short I'm bringing a trainwreck of an old car back to life and
it's on it's second fill in a month of Prestone and I have to drain the cooling system yet again,
and a friend gave me a few gallons of Peak 10 year all vehicle.
I know mixing isn't a best practice but I thought I'd ask if these two were close enough
chemistry wise to do so? It's a mid 80's chevy v8 so no special needs.

 

[CharBaby]

You have to look at the PDS/SDS(if available) on each respective site and see if there are any chemical differences.
That will be the non-consumer fluff that you need.
Most "All Makes/All Models" should be compatible with one another.
However, keep in mind that there are 2-EHA chemistry and Non-2-EHA chemistry...if I said that right!

 

[Bailey28]

I would like to know too. I have a crate Chevy 350 that has been in service since 2017. Currently it has the Rural King Providence green 50/50 coolant. On the bottle it says 'good for 12 months 12,000 miles' in small print. I didn't notice this until after installing this coolant recently.

What can I use that will last longer for a cast iron block? I don't want to change coolant every 12 months, it is slightly labor intensive not to mention I have to drive pretty far to dispose of it properly.

I would have bought something different if I noticed the 12 month notation in the store.

I don't want to dump coolant every year.

 

[nwjones18]

I would like to know too. I have a crate Chevy 350 that has been in service since 2017. Currently it has the Rural King Providence green 50/50 coolant. On the bottle it says 'good for 12 months 12,000 miles' in small print. I didn't notice this until after installing this coolant recently.

What can I use that will last longer for a cast iron block? I don't want to change coolant every 12 months, it is slightly labor intensive not to mention I have to drive pretty far to dispose of it properly.

I would have bought something different if I noticed the 12 month notation in the store.

I don't want to dump coolant every year.

That sounds like some old school real green antifreeze. I'd flush that out and replace with some long life coolant then continue on.. I haven't had any issues with Prestone in any of my fleet but most here seem to prefer the Peak.

 

[Bailey28]

I was in awe of the $6.99 price tag and failed to read I would need to change it every year. The test strips are more expensive than two of these in concentrate. I would be interested in testing with the strip kit to see how long it can go. This is a weekend car not a daily driver as well.

 

[Nukeman7]

I was in awe of the $6.99 price tag and failed to read I would need to change it every year. The test strips are more expensive than two of these in concentrate. I would be interested in testing with the strip kit to see how long it can go. This is a weekend car not a daily driver as well.

$4 at your local WalMart and you are good to go! I use the old-school conventional green Ethtylene Glycol coolant in my Jeep with the 2.5 liter iron block and all brass radiator. The coolant consistently tests good for ~5 years!

 

[FowVay]

The Peak and Prestone are compatible. Bear in mind that they both contain 2-EHA acid so if you're using them in old vehicles there may be some seal/gasket compatibility issues over time.

 

[Bailey28]

So the new "2-EHA" will eat old gaskets but the old green conventional coolant is fine with the old gaskets?

 

[Coolant Kid]

2EHA won't cause any harm at all. 2EHA does not eat old gaskets, rather it keeps them soft, supple and conditioned. Your gaskets will last longer with 2EHA implementation.

 

[wolf_walker78]

Opinions seem to vary on such.

 

[Fitter30]

For over 50 years with a company service van and two cars every two years open the drain cock drain the radiator, flush out overflow/ coolant reservoir with a garden hose then sucked the water out and replace the coolant in both. Radiators have looked good. Oldest chevy 03 astro van newest 13 equinox.