Thread: Penrite Coolant

Thanks guys for the great explanations on coolant. I checked my coolant on the D1 V8 and its green. I had Landrover flush and renew the coolant in 2013. The receipt says Texaco ELC $70 but that's not green so I don't know what's in there. The dealer isn't there any more so cant ask them.

I've never worried too much about coolant but think it's now time to flush the system and renew with a known coolant.

FWIW my Tdi Deefer was one of the very last ones and it came with OAT (and PAS 14315 in the power steering) like TD5.

I ran OAT for years and the internals always looked spotless.
I then swapped to Cummins PG Platinum, a HOAT, purely as I could get it more easily at a good price.

I still have 20 litres and am tossing up whether to run it in the TD5


Oh, and most importantly, colour means nothing!!!!!
It's just s bloody dye!!!

Green is fine for V8's,, similar metals heads/block.
You'll be FOREVER chasing leaks with read oat (which I'm fairly sure LR used/prescribed so as to only need ONE coolant for all D2's and the majority built were TD5's)

Thanks for the input everyone.

I'm still not too sure of my best way forward though.
So staying with penrite brand (and using their colours for ease of ID)

Penrite website recommends blue OAT for all defender diesels

and AK83 found that

The only difference(if it makes a difference that is) that I can see from the product pages is that the red OAT coolant is
"Phosphate, Amine, Borate and Nitrite free"


and the blue coolant is
"Silicate, Phosphate, Amine, Borate and Nitrite free"


The difference is the lack of silicate in the blue one, that they recommend for the TD5.
Have no idea if the Silicate in the red one do any damage to the Td5, and why they wouldn't do so in the Tdi, as the 8 yr red OAT is the recommendation for the 300 Tdi.

Green coolant seems to contain Silcates, and Borates by comparison.


So have I got this right?
Penrite Green HOAT will coat the motor
but Penrite Blue and Red OAT (especially blue) will not coat motor, as Rick outlines

So Red and Blue might do a slightly better cooling job but will weep or leak

Comparing this to the Landrover OAT that I'm using now. Did the Landrover coolant contain the additives and coat the motor?
and which of the three Penrite OAT/HOAT options is the original LR OAT closer to?

I've been looking for info on the Caltex ELC coolant but haven't been able to find anything yet.