I recently purchased a 2000 XK8 and would like to change the oil. What is the best type of oil to use on a 2000 4.0 engine ? I have heard mobile 1 5-30w but have also read to use mineral 15-40w. I live in Atlanta, GA.

Thank you

bcucharternet

 

The recommended oil viscosity for your climate is listed in the manual. There's no need to second guess or experiment.

As for type and brand, it's not much different than asking 'what's the best beer?' Everybody has got a strong opinion and everybody else's is wrong.

Be aware that you might feel strongly about certain preferences but the car couldn't care less.

 

Should I use a mineral oil or synthetic on my 2000 4.0 engine. The listing mentioned to use a mineral on 2000 4.0 and synthetic on 2003 and newer 4.2 engines. Which should I use mineral or synthetic?

Thanks

 

HEY, I've got a 1999 xk8, 4.0 and have been getting my oil & filter changed at a lube shop here where I live and they put 10w-40 Pennzoil FULL synthetic. if I'm not mistaken, the upside with synthetic lubricants is that they leave a film of lubricant on all internal moving parts and that gives you protection when you first start the engine the next time. cold starts are where the most wear occurs. I believe mineral oils don't offer that.


others in here may or may not agree with that. btw, they charge me $72 for the change.

 

I too use Synthetic. My perspective is: Try it, if you like it continue. . . if not don't. I'm sure either works very well. Like Stenson1 said, it is pretty expensive.

John

 

I have been using Mobil1 10w-30 in my 99 XK8 4.0 for years and I go 6000 to 8000 between oil changes and I am in Virginia. I feel it is the right oil for the temperature range I live in. I should mention I have 131,000mi on the car.

 

I have been using Mobile 1 synthetic for ages on all types of cars.

 

No idea what listing you've got, but NO Jaguar either 4.0 or 4.2 (even supercharged) of that era came from the factory with synthetic.

Use them if you like but there will be no real world benefits.

 

OK thanks, it looks like I will use synthetic. I live in Atlanta GA and for our temp range where it is 50-95 for 9 months out of the year the Jaguar manual calls for 0W-40W. I can't find it in our area. Will 5w-30w work or will it be to thin?

Thanks

bcucharternet

 

Again, what does the owners manual say?

 

It says 0w-40w but I can not find a synthetic 0w-40w in the Atlanta area

 

My copy says that 5W30 is perfectly acceptable up to 110*F.

 

mikey, many people use synthetic lubricants for a variety of reasons. they burn cleaner, resist deterioration better and most will leave a light film of lubricant on all the internal moving parts and therefore retarding the wear upon a cold start. many report getting better fuel economy due to the reduction of friction and slightly cooler running engines. I am aware that most engines are designed with a specific operating temperature for optimum performance and i'm not aware of any synthetics causing one to run 'cooler' than the correct operating temperature for a particular engine.


having said all that, mineral oils still provide excellent service and of course are less expensive.


happy motoring,


frank in fl

 

We've all been hearing the above marketing hype for so long (at least 40 years) that many people accept it as 'fact'.

There's actually very little real-world data to back it up. Engine failures due to lubrication are a thing of the distant past, irrespective of what type of oil is used.

Again, owners should choose an oil that meets the OEM spec. Going beyond that will not help the car.

 

Agreed. Follow the manual. It says 5w/30 for almost all applications.

 

If you look at the temp range in your area and in the manual and 10w-30 fits your needs.

Gus
www.jagrepair.com

 

I am kind of old fashioned...DUH I use a 5W30 in the cold(45 to -20 degrees), and 20w50, when it is warm(50 to 110 degrees) I always use a thicker oil, in high mileage engines(over 80,000 miles), and a very good oil filter with a one way valve in it.(not Fram) I also change my oil every 3000 miles. After 4 or 5 oil changes, the oil comes out looking like new, and I like it that way. I know synthetic oil can last a long time, but the chief reason to change the oil is to remove the chemical contaminants, that like eating aluminium and brass. I change my antifreeze frequently also, after having to have a machine shop drill out broken studs, that were eaten away by old coolant....Be cool.....Mike

 

A little something to read - Bob is the Oil Guy - Bob is the Oil Guy

I personally am not in favor of going higher than 10w-30 but that is my preference.

I recently removed my valve cover to inspect the tensioners and I am attaching a photo of that.

 

For hot weather, it is the second set of digits that is important.

That would be the 40 part. And since you don't see freezing weather,
a 15W40 would suit you fine year round.

Walmart sells 15w40 Shell Rotella conventional.

They should also have 0W40 Shell Rotella T6 synthetic.

Forget if Castrol has a 0W40 synthetic.

If you find a Castrol in the 5W30 black bottle synthetic that
says "Made in Belgium" on the back, it is the fabled GC(German Castrol)
that all the oil people rave about. It is a "thick" thirty, and meets the
demanding ACEA A3/B4 European spec as well as various BMW/VW
specs which are again demanding.

BTW, you can take comfort from the fact that Jaguar Warranty coverage
in Mexico for those years required xW40 oil. That may give you some
idea of what Jaguar thought about using a xW40 in hotter climates.

Notice the weasel words in the manual right after the 5W30 recommendation
at the top ... "for best fuel economy". Their concern, which is not your concern,
was meeting CAFE requirements. For most people who have a basic level of
understanding of the English language, "for best fuel economy" is not the
same as "for best engine protection". Read between the lines.

see below for the gory details:

https://www.jaguarforums.com/forum/g...luence-144787/

++

 

why so complicated ... oil seems to be a quite difficult theme ...

the manual says 5W30 ... point

So use what the manual says ... buy Mobil1 or Shell

Using new kind of oils isnīt so clever because you have to notice, that the engine is developed quite a few years ago. Jaguar knows, whats best for the XKs.