Found this on the forums after my purchase.

 

I see the interval for brake fluid change has been extended to 3 years. Finally............

 

Thank you. I had seen that earlier as well for the MY14. I guess we should just assume it's the same for MY16.

 

Might sound a bit crazy but I'll ask the question. What happens if you mix 20 weight oil with some 60 weight oil. Does it average out to be in the area of 40 weight oil. Is mixing different weight oils okay or would it cause damage to the engine. I don't see it as being a problem. Your thoughts please. Thank you

 

My first reaction is why do you think you know more than the manufacturer? It does indeed sound crazy, and it certainly would be a problem after the shop analyzed an oil sample from your blown engine.

 

Minivan has 5w-30 weight oil for the motor. It's a minivan and its oil is thicker than a semi race car engine, just strange to say the least !

 

I can guarantee your minivan isn't built to the same minute manufacturing specs as the fine piece of Jaguar technology is. Remember also, that a well crafted engine may have smaller cavities for oil to flow though and thicker oils could possibly raise oil pressure.

I'll stick with what the manufacturer states to use. Afterall, they designed and built it, they should know!

 

But then why does BMW M/// division use 60 weight oil. That was in my M5 sedan. I'm not expert that for sure.

 

Perhaps BWM manufacturers to looser tolerances and requires heavier oil to "fill in the gaps"...

 

LOL . . . I don't remember what oil it used, but my '02 745i burned a quart every 1000 miles up until the engine failed at 10K. BMW always told me that was "normal consumption." I'm pretty sure it wasn't 10w-60 oil, but maybe it should have been.

On the other hand, I've never added a drop to my F-Type.

 

You'll end up with half the oil too thin for hot weather operation and the other half too thick for proper lubrication under cold start. Goldilocks would find none of her bowls of porridge to be 'just right'

Non-multigrade or 'straight' oils contain none of the additives and blending voodoo magic that makes a 20W60 suitable at both temperature extremes.

 

Once again this is almost the same thread as on every car forum.

Do what you want. Put whatever oil in your car that you want. Hopefully it will last until you sell it to an unsuspecting schmuck.

As for me, I'll let the dealer change mine so that Jag specified oil is used at the recommended intervals and it is duly recorded in the warranty records.

 

What is the best motor oil viscosity?

There is no single best motor oil viscosity. As a rule of thumb always follow the car manufacturer’s recommendations. Older cars are usually ok with a 10W-30 oil, while newer cars usually like a lower viscosity oil, like 5W-30, 0W-30 or sometimes even 0W-20. It’s important to keep in mind that viscosity is not the only important property of the oil: if there are some further specifications (e.g. API SN or GM Dexos 2) required by the car manufacturer then the oil should meet those specifications and should also have the correct viscosity in order to be used for that particular vehicle.

 

Here you go, if you want a long read about oils. There is even a test at the end to see what you learned.

Motor Oil - All Chapters, Inclusive -Copy and Save This - FerrariChat.com

 

Yep. What worked on the axles of a Conestoga wagon isn't right for a Model T engine. What's right for a Model T might not be best for a '56 Bel Air. I don't know. I've owned neither, but there's no way I'd swap oils between my MV Agusta and my 99 Turbo: Different needs, different tolerances when manufactured.

And yet, every car forum ends up with an oil thread that questions manufacturers' recommendations, and another about used oil analysis. I put the latter into the "trust but verify" category. The former? I have some suspicions when no design change has taken place but oil recommendations get thinner for improved fuel economy, but if you think the manufacturer is willing to replace engines under warranty for bogus oil recommendations, I suggest you reconsider.

 

Or check this out:

Motor Oil 101 - Bob is the Oil Guy - Bob is the Oil Guy

 

A huge mystery and no one has a clear cut answer.

 

No, it's not a huge mystery, just a complex subject about which most are clueless.

 

But I will admit, I probably fall into the clueless catagory when it comes to fully understanding motor oil selection . I'm not ashamed to admit this.

 

Both links posted in this thread were written by the same expert. If you're a bright guy and invest a fair amount of time studying what he clearly explains, it should no longer be a mystery to you.

However, for the average bright person, the easiest and "smartest" strategy is to accept that the manufacturer has done extensive testing and knows far more about what's best for your engine in normal street use than you do. Obviously, with longer and longer powertrain warranties now essentially standard, the last thing in the world they can afford is making the wrong oil choice. If they do, they pay the price.

If you still can't accept the above rationale, then just accept the fact that if you use something other than what they recommend and you have a problem, then you'll likely eat the cost of replacing your engine.

It's also important to remember that they sold you a car intended for street use, and if your primary use is on the race track, you'll also have to accept the consequences.