I own a 2007 Jaguar X-Type 4 door sedan. It has the 3.0L 6 cylinder engine. It requires Premium fuel.


Asked by Oct 14, 2014 at 12:44 AM about the 2007 Jaguar X-TYPE Base

Question type: Car Customization

I was wondering how difficult it would be to convert / retrofit the engine to run a lower octane fuel, or even E85. I live in Michigan and E85 is the least expensive fuel, Premium is the most expensive.

5 Answers


You will NEVER EVER recover the conversion cost. Sell the Jaguar and buy a Hyundai.

1 of 1 people found this helpful.

It's possible but expensive, you have to change the compression (Pistons) & or the cylinder head cc combustion chamber volume to use lower octain fuel. Most cars hi-comp cars like this can get by on 89 octain. I use it in my turbo Fiat & Mini. It's good to use fuel injection cleaner once & awhile.

1 of 1 people found this helpful.

It might be cheaper to move to a state like Kentucky or Tennessee where the 90+ octain gas is under $3.00/gal.


FYI: esencetully the newer Jaguars like yours are a Ford Taurus .

2 of 2 people found this helpful.

Try a patented product called Bestline -you will be blown away!

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