All coolant additives equal???
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Joined: Sep 1999
Posts: 351
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From: Palos Hills, IL USA
Car: 1992 25th Anniversary Z28
Engine: 6.3L - 383
Transmission: 700R4; Vig 3200
All coolant additives equal???
I've been doing a little research on coolant additives and the main ones I'm considering are:
- RedLine Water Wetter
- Royal Purple Purple Ice
- 40 Below
- Valvoline Zerex
They all seem to be pretty much on par with each other...just curious if anybody has preference to a particular brand for any reason....
Most likely I'll just pickup whatever one I can find cheapest....I believe they recommend changing it every 10-15K
- Joel
- RedLine Water Wetter
- Royal Purple Purple Ice
- 40 Below
- Valvoline Zerex
They all seem to be pretty much on par with each other...just curious if anybody has preference to a particular brand for any reason....
Most likely I'll just pickup whatever one I can find cheapest....I believe they recommend changing it every 10-15K
- Joel
Senior Member
Joined: Mar 2005
Posts: 960
Likes: 1
From: Wichita KS
Car: 1987 GTA/1998 Explorer
Engine: 355, trick flow heads, zz409 cam, 3
Transmission: 700r4, shift kit, valve body
Axle/Gears: precision 3.73's, auburn diff
yeah whats the story on 40 below? i saw some at autozone, and it was like 25 bucks for a small can of it, is it worth it?
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Joined: Jan 2000
Posts: 20,981
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
They're intended to be used with straight water in racing engines. I don't know if I'd want to use an additive on on the street. If you're having cooling problems, you'd be better off correcting whatever's wrong.
Supreme Member
Joined: Aug 2004
Posts: 4,168
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From: Marietta, GA
Car: '91 Firebird Convertible
Engine: 305 TBI (LO3)
Transmission: 700r4, Vette Servo
Axle/Gears: 3.27 9 Bolt, PBR disks
I added Water Wetter to my radiator before the last flush (last week) and saw no noticeable change in cooling. That said, I made sure there was a bottle in the radiator after I flushed it last week. Nothing is too good for my car. 
