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I am a mechanical engineer. I was involved in a similar discussion on what is the difference between a motor and engine after work, once upon a time. There seemed to be a consensus that an engine burns fossil fuel and a motor uses electricity.
After reading definitions from various sources our consensus was wrong. Motor and engine are pretty much synonymous and interchangeable.
Look them up and read the definitions.
Like I said, stupid people used it wrong but since SP is now a majority, the majority rules. Language always "evolves" (devolves) and the Lowest Common Denominator wins.
Years ago I used to win many, many arguments by using dictionaries probably dated in the 1970s, which Specifically stated that Engines use heat and combustion to cause mechanical force and thus used to produce rotation, and that Motors used Electromotive Force to create rotational force. There WAS a succinct difference 'back then', but the Dictionary Definitions have changed since then to acquiesce to the Common People (morons). THEREFORE, the ignorant cause language to change to their own level of understanding, usually to a much lower degree of understanding. MUCH lower......
Outboard trolling motors are battery powered. They're slow and quiet so as to not spook the fish.
A clever student of the nuances of the English language is a cunning linguist.
I agree with both davchr and Cee Jay. Their views are not mutually exclusive; in fact, they explain how common usage caused engine and motor to become synonymous, even though they originally had different meanings.
Bottom line is that proper English, like cursive writing, is quickly becoming a lost art thanks to technology. Hooray for progress! Chip readers take forever to process compared to the old swipe cards. Most people today correspond using a keyboard, and Twitter has reduced spelling to abbreviations. Soon we'll be back to communicating like cavemen. We humans won't have to think any more because we'll have drones with artificial intelligence that will do that for us so we can devote more time to playing video games. Or will we? Natural selection and survival of the fittest ... who (or what) will be left? Fortunately, by that time I won't be around to find out.
I never should have started this nonsense. Jaguars are way more important and fun! All that really matters is that we understand each other. And enjoy the ride!
Engines use heat and combustion to cause mechanical force and thus used to produce rotation, and that Motors used Electromotive Force to create rotational force.
Originally Posted by Cee Jay
Once again......
MOTOR;
Verb - to move under ones own power.
Considering oil change is usually just once a year, I would only use what Jag says (or any other marque) is their "OEM Oil". I would choose that oil vs another one with the same specs... No one can throw your choice back at you if you used the exact oil they mentioned.
You get an A for Effort but unfortunately, even from Jaguar themselves, this response is somewhat ambiguous...
1, I assume they mean "Castrol Edge Extended Performance" because I can't find anything called "Castrol Edge Extended Life"
2. Castrol Edge Extended Performance does not list it meets WSS M2C925-A.
A better question would be what spec, if any, supersedes WSS M2C925-A? If there are any, that would allow us to find an alternative. My dealer said none exists (for what that is worth).
Curiously, Castrol Edge Extended Performance 0W20 doesn't meet ANY of the Ford specs (if that means anything).... the 5W20 does:
https://msdspds.castrol.com/bpglis/FusionPDS.nsf/Files/6BD5DE4872AB5E8B80257E7D006877B9/$File/BPXE-9C77UN.pdf
The most important question that technical minds and non-technical minds should be asking themselves is why did they switch to the thinner weight oil. Across the board on all vehicles that use this 5.0 engine.
The most important question that technical minds and non-technical minds should be asking themselves is why did they switch to the thinner weight oil. Across the board on all vehicles that use this 5.0 engine.
What is interesting to me is that my dealer told me last april (I get my annual oil change then) that they were told by JLR to use the specified oil listed in the OM. So my 2012 XKR gets the dealer Castrol out of their 5W-20 drum and the F-type 5.0 got it's Castrol out of the 0W-20 drum. It will be interesting to see what they give me next april.
I dont think it makes much difference in well maintained, sparingly used cars such as yours.
My take is that they went to the thinner oil for better flow at startups. Due to the oil becoming heavy with buildup and causing chain tensioner to not build pressure fast enough. And the VVT not building oil pressure fast enough.
Jaguar is very sensitive to this issue- which shows how they care a lot about this engine's reputation. Its their first all Jaguar engine. They are the only one to design a mechanism that keeps the oil in the VVT even after engine shutdown. They got a patent for it. Others go through a brief period where an oil actuated cam is basically running dry- i.e it's completely in the wrong position.
Why not use a thinner oil from the begining? I posted many articles showing that the oil-loading phenomenon was only discovered recently by the larger scientific community.
As brilliant as Jaguar engines were, they were just too small of a company to do it all.
To some degree even this All Jaguar engine was only possible due to the financing, and machine shop provided by Ford.
Perhaps I should have stated it better: it the first time Jaguar got to do everything they wanted and dreamed of.
The v12 came about when they purchased an engine manufacturer, where Mundy worked. Right there we are talking about the influences of another shop. However, here is where I am unclear, my understanding is that the v12 was designed for Lotus or Chapman 10 years earlier as a 4.4 but shelved. I am specifically unclear about who designed it 10 years earlier, was it Hassan or Mundy. They had different masters then.
The Hassan XK engine was when they bought Standard. And made in Standard's shop.
The AJ I cant even think straight on- it was a cluster mess with British Leyland fighting them all the way.
For 5l engine, the original formula was Castrol SLX Professional 5W20; the DIRECT replacement is Castrol Edge Professional A1 5W-20 - see the bottle picture on the link.
The latest TSB (and confirmed by my dealer) from LR/Jaguar say that you can also use 0w20 Castrol (STJLR.51.5122), but I could not find anyone selling this! Castrol EDGE Professional E 0W-20
Boosted with TITANIUM FST
Mmmm... Mayhap I'll just go down to Wally World and get a couple jugs of Mobil 1 0-20 for Honda. Hondas last forever and it's a corporate harikari offence to recommend inadequate lube!
but unfortunately, even from Jaguar themselves, this response is somewhat ambiguous... 
