What type of gas should i use for a Jaguar XF 2013? Is there a real problem if I use regular gas or is just about performance?

 

I run the recommended Premium in my '15. Its supercharged and I can't imagine even considering running anything else. Google it.

 

Welcome to the forum All,

I've moved your question from Off Topic to X250 forum. This is the place to post technical questions about your model.

Please follow this link New Member Area - Intro a MUST - Jaguar Forums - Jaguar Enthusiasts Forum to the New Member Area - Intro a MUST forum and post some information about yourself and your vehicle for all members to see. In return you'll get a proper welcome and some useful advice about posting to the forum.

Graham

 

I can't speak to the XF models directly but my personal experience with the S-type plus dozens/hundreds of posts here on various models indicate that most see no difference whatsoever. A few have noted minor decrease in maximum performance or slight increase in fuel consumption.

Not one case of engine damage has been observed.

 

i think the MFG er recommends a minimum octane for each model engine ...

 

This is a touchy subject, you will get several recommendations.


So, here is mine.


Use the recommended fuel grade listed in the manual for your car and model/trim line. It should also be listed on the gas cap.




As a general rule of thumb - For any forced injected engine, use the highest octane rating available in your area.


The basic concept is that higher compression motors need higher octane rated fuel to reduce the tendency of pre-detonation (ignition of fuel before spark plug firing). Forced induction cars have lower compression pistons because as the turbo/supercharger starts doing its job, the compression is raised significantly due to the pressurization caused by the blower/turbo.


If you drive your car very gently and never "get on it", cheap gas will work, but I personally do not recommend it.


If you ever have a drivability issue and take it to the dealer, they will ask what gas you use first, if you use lower octane gas, that will be their first recommendation to try to fix the issues.

 

There's no such thing as 'pre-detonation'. There is 'pre-ignition' and there is 'detonation'.

Pre-ignition is ignition of fuel before spark plug firing.

Detonation is 'explosion' of the fuel rather than normal burning.

High octane fuel reduces the tendency of the fuel to detonate but has no effect on pre-ignition.

Jaguar recommends the same octane level fuel (91AKI/95RON) for both supercharged and non supercharged engines. Making an assumption that all supercharged engines are more likely to experience detonation than non-supercharged is incorrect.

 

You are splitting hairs Mike.


I will not get into that with you.


I have read countless threads where you keep saying that same thing over and over again.


It all results in the same thing, burning before you want it to burn.


And that is exactly what higher octane fuel is there to prevent.


I have given my opinion, the OP can do with it what they want to.

 

You and others keep posting incorrect information that confuses the original poster.

Apparently you think that 'burning' and 'exploding' are the same thing. They're not in any sense of the word. High octane gas burns just as easily as low octane. High octane is more resistant to exploding. Please do some research.

 

You are focused on definitions of certain words and not the concept of why you use low octane vs. high octane.

You would rather pick apart one word in an entire paragraph instead of helping someone understand the value of following manufacture recommendations.

You go right on using low octane gas in a high performance engine (against manufacturer recommendations) and i will use high octane gas and get the most out of my motor.

 

The net effect is that your myths and misconceptions confuse the issue which does not help the OP in any manner.

 

The correct answer is that Jaguar have done LOTS of research and if you use what they recommend it will be fine. They do NOT say to use special voodoo extra expensive stuff instead. (They even say to avoid extra additives). So just use what the car maker say to use!

Which is what Mikey posted...

Of course if you think you know better than Jaguar then that's OK for your own car(s). Do as you like.