Engine Oil 2.7 Diesel

[Journeytower]

I have a 2007 Disco 3 with the 2.7l Diesel. I'm wondering about using Castrol Magnatec 10W-40 as I can purchase this very cheaply when on special, like around $20 for five litres. This is the non synthetic non diesel specific but suitable for petrol & diesel motors. A Castrol technician said some time back that this is the oil that he uses in a multi valve diesel the same as I still have, a Hyundai Terracan 2.9 diesel engine. He just changes it at 5k intervals & saves the money. I've been using it in the Terracan for 140k now with 10k intervals & still performing well & no crankcase blowby, no leaks etc.
Has anyone been using a similar engine oil in the 2.7l Disco ?

[beetroot]

Not a Disco 3 owner, but hope to be soon and have read a lot about them and the TDV6.
I would be checking the owners manual and workshop manual, if you don't have them get them!

I believe that 5w-30 is the recommend weight and the advice from LR is not to deviate!
As there are known potential issues with the main bearings in the TDV6 I would be careful about going to a different oil than recommended, especial if the only reason is price!

I'd be wary of going to a 10w40 if 5w30 is what is recommend is Australia, as you may not have the protection if it gets cold.
Also beware that the oil weight isn't the only factor here, the CI specs, SN specs, additives and fully synthetic vs semi vs mineral are just as important as weight.
There is tonnes of reading about oil specs that'll keep you busy for hours.

5w30 is a pretty common oil these days (in New Zealand anyway) and I have often seen it on good sales at Repco and Super cheap (pretty sure most NZ oil comes from Australia).
I would only deviate from the recommended specs if I were going to a higher spec.

[beetroot]

Copied from DISCO3.co.uk

The specification of 5w30's is mainly around the additive package that goes into the blend, most now are low SAPS (Sulphated Ash Phosporus and Sulphur) this is to help keep the Cat or DPF clean, vehicle manufacturers adjust the specification to add different detergent packages that they think best for their engine.

Most of our handbooks say Castrol 5w30 this is the original fill and therefore the recommended, not essential but try to get to the original specification. For Castrol it would have been Magnatec because that was the oil of the day in 2004, today it is Edge, not recommended just because it didnt exist but it is a newer and superior specification.

Anyway just to bore the socks off you, the 5w30 is suitable for the UK climate but would not necessarily be so for other climates, this bit I have copied from elsewhere explains:

In a 10w-40 for example the 10w bit (W = winter, not weight or watt or anything else for that matter) simply means that the oil must have a certain maximum viscosity/flow at low temperature. The lower the “W” number the better the oils cold temperature/cold start performance.

The 40 in a 10w-40 simply means that the oil must fall within certain viscosity limits at 100 degC. This is a fixed limit and all oils that end in 40 must achieve these limits. Once again the lower the number the thinner the oil, a 30 oil is thinner than a 40 oil at 100 degC etc. Your handbook will specify whether a 30, 40 or 50 etc is required.

ACEA: This is the European equivalent of API (US) and is more specific in what the performance of the oil actually is. A = Petrol, B = Diesel and C = Catalyst compatible or low SAPS (Sulphated Ash, Phosphorus and Sulphur).

Unlike API the ACEA specs are split into performance/application catagories as follows:

A1 Fuel economy petrol
A2 Standard performance level (now obsolete)
A3 High performance and/or extended drain
A4 Reserved for future use in certain direct injection engines
A5 Combines A1 fuel economy with A3 performance

B1 Fuel economy diesel
B2 Standard performance level (now obsolete)
B3 High performance and/or extended drain
B4 For direct injection car diesel engines
B5 Combines B1 fuel economy with B3/B4 performance

C1-04 Petrol and Light duty Diesel engines, based on A5/B5-04 low SAPS, two way catalyst compatible.
C2-04 Petrol and light duty Diesel engines, based on A5/B5-04 mid SAPS, two way catalyst compatible.
C3-04 Petrol and light duty Diesel engines, based on A5/B5-04 mid SAPS, two way catalyst compatible, Higher performance levels due to higher HTHS.

[Tombie]

Put simply - NO!

You’ll spin the crank bearings!!!

How cheap do you want to go on a $18k engine?

[DiscoJeffster]

I would recommend you find the Ford specification of the oil for your vehicle and stick to that oil. Penrite, Castrol, and many others do meet this specification. A 20L Penrite C4 Enviro which meets the specification of the 3.0L can be had for ~$200 as an example.
As Tombie mentions, it could end in disaster, and given the reported problems with bearings, I wouldn’t take the risk using non code-compliant oil.

[Tombie]

Not enviro in a 2.7

Penrite Full Syn 5W-30 is the go

[DiscoJeffster]

Not enviro in a 2.7

Penrite Full Syn 5W-30 is the go

Can you provide a link please? I cannot find a non-Enviro+ oil in their list that meets the needs.

[letherm]

Can you provide a link please? I cannot find a non-Enviro+ oil in their list that meets the needs.

Here's a link to Penrite. The oil Tombie suggests is on the right hand side. Click on it and you can select a "Where To Buy' Dialogue.

Penrite Oil | FULL SYNTHETIC 5W-30

Martin

[DiscoJeffster]

Here's a link to Penrite. The oil Tombie suggests is on the right hand side. Click on it and you can select a "Where To Buy' Dialogue.

Penrite Oil | FULL SYNTHETIC 5W-30

Martin

Ah, under Everyday oil. Sorry, my bad. Good to know this option exists as well.

[Tombie]

As per their recommendations: