VP STAY FROSTY Coolant

[Yukiwari]

Hello everyone,

I’m considering using VP STAY FROSTY radiator water in a regular car, specifically my Hyundai Elantra MD. I live in a hot subtropical climate, with summer temperatures reaching around 48°C (118°F) and winter temperatures between 5–8°C (41–46°F), so freezing isn’t a concern.

I have a few questions:

1. Does it actually help reduce temperatures at the engine head?
2. Is it suitable for regular cars like mine?
3. What is the recommended replacement interval—one year or less?

Thanks in advance for any insights!

 

[Rand]

1)do you need reduced temperatures at the engine head?
2)racing use also where no glycol is allowed
3)maybe

short answer: Solution in search of a problem for normal use vehicle.

 

[Yukiwari]

I get that special coolants aren’t usually needed for regular cars. But I live in a very hot area (summer up to 48°C / 118°F) and drive on the highway twice a week.

My Elantra MD runs steady at 93°C (199°F) and can go up to 95°C (203°F) under load. Even a small drop in engine head temperature helps, so I’m considering VP Stay Frosty, since its glycol-free formula may improve heat transfer.

Thoughts?

 

[Johnny248]

It's def a good product and in the right application probably keeps a handle on cooling since it skips the glycol. My concern would be corrosion lifespan? I live in a four season part of the country and don't know anyone who uses it in a daily. I know several guys who run it in their bikes and atv/sxs's but they also change it more often than a normal car.

 

[kschachn]

Are you already running the lowest recommended concentration of coolant? That will do more to improve heat transfer than any super duper coolant.

 

[doitmyself]

Unlike the purple version, the blue version (95-99% water) doesn't mention much about corrosion protection.

 

[Yukiwari]

Are you already running the lowest recommended concentration of coolant? That will do more to improve heat transfer than any super duper coolant.

I’m currently using Prestone Max Asian 50/50 P-OAT. The issue is that after about a year it tends to shift closer to 60/40, and that’s my concern — the higher glycol concentration reduces heat transfer efficiency.

That’s why I started looking into glycol-free options like VP Stay Frosty

 

[Yukiwari]

It's def a good product and in the right application probably keeps a handle on cooling since it skips the glycol. My concern would be corrosion lifespan? I live in a four season part of the country and don't know anyone who uses it in a daily. I know several guys who run it in their bikes and atv/sxs's but they also change it more often than a normal car.

That’s why I’m curious about VP Stay Frosty. Even a small drop in temps would be helpful in my situation. Do you know if it really provides enough corrosion protection, or is there little to none?

 

[Yukiwari]

Unlike the purple version, the blue version (95-99% water) doesn't mention much about corrosion protection.

I see, thanks for clarifying! The high-performance purple version isn’t available in my country, so I only have access to the blue Stay Frosty.

It seems like it might be great for cooling, but I’m curious about corrosion protection — do you think it offers enough, or is it minimal compared to the purple version?

 

[Johnny248]

The tech sheet says "meets ASTM corrosion protection standards."

https://www.amaproracing.com/storage/app/media/uploaded-files/stay-frosty-overview-aft.pdf

 

[doitmyself]

The tech sheet says "meets ASTM corrosion protection standards."

https://www.amaproracing.com/storage/app/media/uploaded-files/stay-frosty-overview-aft.pdf

Yes, thank you for correcting my error. The bottom right of each label claims the same ASTM corrosion protection. Their website blue literature does not mention corrosion protection like they do on the purple version.

I was looking for that tech sheet. Good find.

 

[BrendanC]

30/70 mixture and call it a day. my truck is 30/70 because it simply doesn’t get cold enough here to need 50/50 and it’s cheaper. car has wallyworld 50/50 blue. those temperatures are not alarming, dump some more distilled water in it if you’re really that worried about it. nothing bad will come from 204°F

 

[Johnny248]

30/70 mixture and call it a day. my truck is 30/70 because it simply doesn’t get cold enough here to need 50/50 and it’s cheaper. car has wallyworld 50/50 blue. those temperatures are not alarming, dump some more distilled water in it if you’re really that worried about it. nothing bad will come from 204°F

This takes be back about 35 years when I got my first dirt bike. 85 yZ80, and I remember reading in a magazine how water is better at cooling than antifreeze, and they specifically mentioned a 70% water, 30% antifreeze mixture. If you don't experience freezing temps, I would probably do the same in my vehicles.

 

[Yukiwari]

Since VP Stay Frosty has corrosion inhibitor and the company recommends replacing it every two years (I change mine every year because of the climate and because a 50/50 coolant tends to shift to 60/40 after a year),

using VP Stay Frosty now seems like a better option than regular coolant.

 

[kschachn]

Since VP Stay Frosty has corrosion inhibitor and the company recommends replacing it every two years (I change mine every year because of the climate and because a 50/50 coolant tends to shift to 60/40 after a year),

using VP Stay Frosty now seems like a better option than regular coolant.

Add some water then to bring it down?

You seem to be skirting the obvious here, if a 30% coolant concentration won’t work well enough then you have a mechanical problem or defect that needs to be corrected.

 

[BrendanC]

one thing i do on my vehicles every once in a while is wash the radiator from the engine compartment outwards every year with a garden hose. helps push all the dead bugs and what not out.

may be frowned upon here but if they’re unusually dirty i’ll spray degreaser on everything and let dwell for a few minutes then rinse. clean radiators are important for heat transfer.

 

[Yukiwari]

Add some water then to bring it down?

You seem to be skirting the obvious here, if a 30% coolant concentration won’t work well enough then you have a mechanical problem or defect that needs to be corrected.

No overheating issue here — temps stay steady at 93°C (199°F). The problem is that after a year the mix creeps up to ~60% glycol, likely from water loss in our extreme heat. That’s why I’m leaning toward glycol-free VP Stay Frosty with yearly changes for better heat transfer.

 

[Davejam]

My Elantra MD runs steady at 93°C (199°F) and can go up to 95°C (203°F) under load. Even a small drop in engine head temperature helps, so I’m considering VP Stay Frosty, since its glycol-free formula may improve heat transfer.

Those temperatures are totally acceptable...most cars run that hot by design.

I don't think you need freeze protection in your climate, so run a 70/30 mix (Water/coolant).
Water is a better heat transfer fluid than glycol, but you need the coolant for freezing and anti-corrosion.

If you're determined to use the VP coolant, go for it, it should work fine.
But the claim it reduces temperatures by up the 14F is compared to 50/50.
Compared to 70/30 maybe a degree or 2 if you believe that its somehow actually superior.

 

[kschachn]

No overheating issue here — temps stay steady at 93°C (199°F). The problem is that after a year the mix creeps up to ~60% glycol, likely from water loss in our extreme heat. That’s why I’m leaning toward glycol-free VP Stay Frosty with yearly changes for better heat transfer.

If you’re losing water with a coolant mixture, then you will lose water no matter which mixture you’re using. You’ll have to add water either way so I don’t see what the advantage is.

 

[BrendanC]

No overheating issue here — temps stay steady at 93°C (199°F). The problem is that after a year the mix creeps up to ~60% glycol, likely from water loss in our extreme heat. That’s why I’m leaning toward glycol-free VP Stay Frosty with yearly changes for better heat transfer.

offset it with distilled water. you’re still not in overheating territory. i’m in houston where we also have extreme temperatures and humidity. i can get my car to 212°F beating through I10 traffic and it continues to run day after day.