Engine Oil 2.7 Diesel

FWIW all the HD oils that meet ACEA E6/E9 for 100,000km oil change intervals (depending on used oil analysis) in over the road trucks are predominantly Group III Base oils, so they are pretty damned good
As Shane said the good Group III oils are near enough equivalent to most PAO's except at very low ambients, far lower than anything we see in Australia.

These days most all oils are blends to greater and lesser degrees.
Even highly touted full synthetics like Redline and Motul aren't straight POE bases, they have a certain % of PAO, and as Shane said, often the additive packs need a small % of mineral oil for solubility.

The old cliche of the sum of the parts is greater than the individual components is particularly true for oils.
The combined additive package is still probably more important than the base oils.
Think of most long haul trucks doing well past 1,000,000km before any major work is done on full mineral based oils at around 30,000km change intervals.

Quote:

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Originally Posted by garrycol

Daz - I quoted you so was referring to you.

So what you are saying is that when Penrite and other companies advertise their oils as Full Synthentic it is false advertising and the authorities are supporting this by not taking them to task.

So if Full Synthetic oil is actually Semi Synthetic what is Semi Synthetic - full Mineral advertised as Semi Synthetic.

Based on your inside knowledge have you reported the oil companies to the ACCC etc for false advertsing?

Garry

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SOME USEFUL INFORMATION
"So if Full Synthetic oil is actually Semi Synthetic what is Semi Synthetic - full Mineral advertised as Semi Synthetic."

As already mentioned by others, most "full synthetic" "semi synthetic" "synthetic technology" engine oils are produced from group 3 base oil stock
Base oil: Base oil - Wikipedia
Synthetic oil: Synthetic oil - Wikipedia

More importantly....from wiki, but you will find similar wording and descriptions from trusted sources (as in not related to the Petroleum industry)
Some "synthetic" oil is made from Group III base stock, some from Group IV. Some from a blend of the two. Mobil sued Castrol and Castrol prevailed in showing that their Group III base stock oil was changed enough that it qualified as full synthetic. Since then API has removed all references to Synthetic in their documentation regarding standards. "Full synthetic" is a marketing term and is not a measurable quality.


THE BELOW IS MOSTLY BULL**** IMHO
"So what you are saying is that when Penrite and other companies advertise their oils as Full Synthentic it is false advertising and the authorities are supporting this by not taking them to task."
I made no reference to any particular oil refining company or oil blending company.
The "Authorities" who ever they may be, wordwide I guess? are likely to be irrelevant to the oil industry that is worth about 1.2 trillion U.S dollar per year.

"Based on your inside knowledge have you reported the oil companies to the ACCC etc for false advertsing?
I made no mention nor did I ever insinuate that I had some inside knowledge, I know nothing about the oil industry or oil chemistry.Do you honestly believe a 1.2 trillion US dollar a year industry even knows the ACCC exists??? (huh the who??)
To believe somehow the likes of the ACCC or any other "authority" has some mighty power and can bring down Thors hammer to corporation as they need is fantasy.

Regards
Daz

Quote:

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Originally Posted by 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 ?

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To get back and answer the OP...
*You may well find it to be fine, BUT the thing that turns me off with a lot of Castrol products is the lack of available tech information.
*I think its fair and reasonable to look for the Ford spec on a product (M2C913)

The basics of a 5W40 (multi grade) engine oil (very very simply explained, without getting into additive packs, polymers in the engine oil)
*When cold such as on engine start up will have good flow characteristics as a single weight SAE 5 engine oil. (5W is the winter grade)
*When hot or at that industry standard testing of 100 deg C will perform like a single weight SAE 40 engine oil.

*So a 5W40, 10W40, 15W40, 20W50 are all going to perform similar and offer similar protection when hot or at that 100 deg C testing point. (thats the last two digits)
*But at that oh so important cold engine start up where most engine wear occurs, the 5W40 is going to offer the best engine protection due to its better flow characteristics.
*The difference between a 5Wxx and a 10Wxx multi grade engine oil is likely to be not much if anything.
*On the opposite end a xW40 over a xW30 may well offer that little bit more protection at that 100 deg C testing temp.

Regards
Daz

Theres some interesting reading here - in particular what Dazza has already mentioned is that the API and SAE dont have or have removed definitions of what a synthetic oil is:
Synthetic Motor Oil
Bear in mind its from a company who makes synthetic oil so just be aware to the marketing within the information