Thread: 6x6 using oil

Originally Posted by Chris078

That's not really very bad at all.
if it start burning that every 100 or 1000km it might be worth investigating.

see what happens after a few full oil changes and the crud gets washed out.
use a decent quality oil like Castrol RX super or Isuzu Gold 15w40.

The manual says SAE40 so I use Penrite HPR40 25W-70.

Originally Posted by Mick_Marsh

The manual says SAE40 so I use Penrite HPR40 25W-70.

hmm. I thought SAE40 OMD115 was 15w40. Certainly that is what everyone I have spoken to uses in their Perenties

Toyota dealer told us that the reason their product used oil was that we used dello 400 LE 15W-40. we advised to use a synthetic 5W-30.


The trial of a few new vehicles vehicles that we picked all used more oil with the 5W-30. and showed no other benifit in the 120K that we keep them.


The Isuzu we have make oil.

Originally Posted by Mick_Marsh

The manual says SAE40 so I use Penrite HPR40 25W-70.

Firstly that is a petrol oil, so not suitable for diesels.

Secondly it is far too thick.

Originally Posted by isuzurover

Firstly that is a petrol oil, so not suitable for diesels.

Secondly it is far too thick.

Just double checked and the manual says SAE grade 40 (OMD 115) but that is 15w40.

Mick if you really are running 25w70 I'm amazed that motor has not had a failure of some kind. That oil is way too thick.
You should change it and enjoy a huge increase in power. Your oil pump will love you as well.

Originally Posted by Chris078

Just double checked and the manual says SAE grade 40 (OMD 115) but that is 15w40.

Mick if you really are running 25w70 I'm amazed that motor has not had a failure of some kind. That oil is way too thick.
You should change it and enjoy a huge increase in power. Your oil pump will love you as well.

Apart from the viscosity issue, more important is that the oil he quoted is a petrol engine oil, which means it doesn't have the additive package (surfactants etc) to cope with all the soot that diesels put in the fuel. So the engine will be subject to accelerated wear and sludging issues.

Originally Posted by Chris078

Just double checked and the manual says SAE grade 40 (OMD 115) but that is 15w40.

Mick if you really are running 25w70 I'm amazed that motor has not had a failure of some kind. That oil is way too thick.
You should change it and enjoy a huge increase in power. Your oil pump will love you as well.

The Perentie manual as published by the ADF says to use SAE40 oil.
Penrite HPR40 oil is SAE40.
I spoke to a Penrite rep, showed him the documentation and asked for his recommendation. He pointed to HPR40 oil. The Penrite rep I would suggest has a greater knowledge of oils than most.

Everyone is entitled to their opinion. You are and I am. I'm a fellow who wants opinion to be backed up by documentation. Verifiable documentation, not just someone's opinion written on a piece of paper.
I can produce the ADF advice to use SAE40 oil.
Ok, so you use a thinner oil. Where is the documentation that supports your choice?

Originally Posted by Mick_Marsh

The Perentie manual as published by the ADF says to use SAE40 oil.
Penrite HPR40 oil is SAE40.
I spoke to a Penrite rep, showed him the documentation and asked for his recommendation. He pointed to HPR40 oil. The Penrite rep I would suggest has a greater knowledge of oils than most.

Everyone is entitled to their opinion. You are and I am. I'm a fellow who wants opinion to be backed up by documentation. Verifiable documentation, not just someone's opinion written on a piece of paper.
I can produce the ADF advice to use SAE40 oil.
Ok, so you use a thinner oil. Where is the documentation that supports your choice?

I'm pretty sure they've stuffed up Mick. Reading through Penrites page on that product, it seems it's a petrol oil, not a diesel oil. Then there is the viscosity issue, which naturally now I'm looking for it, I cannot find the proper government page that describes the definition of OMD-115 but I can say I went through it and 15w40 was what it came out as.

How long have you been using that oil for?