Anti Freeze
Author
Discussion

Zed 44

Original Poster:

1,290 posts

186 months

Monday 10th December 2012
quotequote all
Anyone ever try to work out which one to put in these days.

Green, blue, red, orange, yellow, yellow/green? OAT or HOAT? Silicate or phosphate anti-corrosion chemicals?

Did you know that some will eat copper radiators or that some like composition gaskets? Did you know that some like aluminium engines and some definitely don't?

It's a mine field

On behalf of my sister-in-law, I tried to find out the recommended one for her car off forums and 3 garages and no one seemed to know. In the end, I took the advice of Opie Oils and bought one which they said would definitely not cause any trouble. confused

SuperchargedVR6

3,138 posts

250 months

Monday 10th December 2012
quotequote all
I remember the faff of mixing VW's blue stuff with their red stuff and it turning to a nice gel inside your engine!




HustleRussell

26,548 posts

190 months

Monday 10th December 2012
quotequote all
There's a lot of internet myth on this subject. Coolant will not just dissolve your engine/gasket for fun. Different coolants are designed to meet different environmental requirements and protect different types of engine materials.
I don't know the full story though. When I needed coolant, I bought it from a BMW dealership for a surprisingly reasonable price and enjoyed the peace of mind.

stevieturbo

18,079 posts

277 months

Monday 10th December 2012
quotequote all
Zed 44 said:
Anyone ever try to work out which one to put in these days.

Green, blue, red, orange, yellow, yellow/green? OAT or HOAT? Silicate or phosphate anti-corrosion chemicals?

Did you know that some will eat copper radiators or that some like composition gaskets? Did you know that some like aluminium engines and some definitely don't?

It's a mine field

On behalf of my sister-in-law, I tried to find out the recommended one for her car off forums and 3 garages and no one seemed to know. In the end, I took the advice of Opie Oils and bought one which they said would definitely not cause any trouble. confused
An easy option is to use what the manufacturer recommends.

Zed 44

Original Poster:

1,290 posts

186 months

Monday 10th December 2012
quotequote all
stevieturbo said:
An easy option is to use what the manufacturer recommends.
Dealer didn't know for sure. read

GavinPearson

5,715 posts

281 months

Tuesday 11th December 2012
quotequote all
Usually a specification is listed in the Owner's Handbook that a dealer can translate into something useful. And that's what you need to buy.

Coolant is basically comprised of 3 'ingredients' - water is about 50%, ethylene glycol is typically about 49% and the inhibitor pack is the remainder.

If you use the 'wrong' coolant you don't lose the ability to protect against freezing, but you may end up with 'inhibitor fight' where no corrosion protection is afforded to the metals and they start to corrode.

Zed 44

Original Poster:

1,290 posts

186 months

Tuesday 11th December 2012
quotequote all
[quote=GavinPearson]Usually a specification is listed in the Owner's Handbook that a dealer can translate into something useful. And that's what you need to buy.

Coolant is basically comprised of 3 'ingredients' - water is about 50%, ethylene glycol is typically about 49% and the inhibitor pack is the remainder.

If you use the 'wrong' coolant you don't lose the ability to protect against freezing, but you may end up with 'inhibitor fight' where no corrosion protection is afforded to the metals and they start to corrode. [/quote

And therein lies the problem.


stevieturbo

18,079 posts

277 months

Tuesday 11th December 2012
quotequote all
Zed 44 said:
Dealer didn't know for sure. read
That's because most main dealers barely know what a car is let alone any technical details. Which is a shocking state of affairs really.

Although as others said, an owners manual will clearly say.