Thread: Coolant- Topped up with wrong stuff.

Tombie, do you run the blue Penrite coolant in your Disco.

Originally Posted by D4thebiglap

Tombie, do you run the blue Penrite coolant in your Disco.

Yes I do

Thank you. I'll give it a go. Cheers

Well now I'm confused. I assume the colour of the coolant means something re the additive package.

I have a 2014 D4 with limited information about its service history. The coolant may not have been changed -- or maybe it has. It is red.

The owners manual that came with the car specifies Castrol SF which is green and OAT and meets Ford WSS-M97B44-D.

A Disco owners manual I found online dated 2013 specifies Havoline XLC which is red and also meets WSS-M97B44-D.

Penrite specify their blue OAT coolant for my car and also meets WSS-M97B44-D.

My inclination would be to stick with a red coolant given the colour in it now... or do a full flush and switch to .. what?

Nulon OAT long life 10 year premix does the job and is red.

I have a predisposition to Penrite products, if their coolant concentrate or premix meets the spec (regardless of colour),its what I would use. Most important is the flush with radiator flush, then demineralised water (can do 1 flush with tap water then demineralised, as long as the last flush is demineralised). The penrite red did meet the spec of my 2011D4, no issues with running that, temp gauge never ever went past half, towing or not, summer / winter.

Nulon is also good, have heard some of the Castrol truck coolants also work well