This is being cross posted to and because they get more readership than alt,autos.jaguar and the issue is the same for some models of them.I just picked up a 2003 X-Type with the 2.5 engine and only 3250 miles, yes that is correct, three thousand two hundred fifty on it. It is a long story not worth going into.The owners manual says the car requires Premium Unleaded here in the USA. A person I work with has the same car and said he uses Regular NOT Premium and does not get any pinging and also gets the same mileage as when he used Premium. He claims that the computer retards the spark to prevent pinging and damage.My question is will I damage the engine if I do the same.Double Tap

No. The 'person' is right. The engine has a 'Knock Sensor'. What might be called a pinking sensor, which advances or retards the ignition timing to suit the grade of fuel being used.In effect the ECU 'learns' the best ignition setting.Mike.

Premium or Regular Gas ?

Jan 27, 2007 41 Replies

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Dori A Schmetterling 19 years ago

Been away....

DAS

For direct contact replace nospam with schmetterling

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Double Tap 19 years ago

I love it when dead threads are revived Double Tap

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