Agree with DavoWA, the correct oil as per pg 34 of the “Customer Assistance, Warranty And Service Guide BA Series” service logbook is 15W/40. Here's an extract of an email I sent to Ford Aust Customer Service the reply: ----------------------------------------------------------------------- Thank you for your reply. Using Castrol 10W-30 is ok, however we suggest to replace this oil with 15W-40 in approximately 5000kms due to the oil now in your vehicle being a lighter grade and thinner quality, and replacing it with a thicker grade. As to Brand Name's of Oils, Ford Australia does not recommend any particular brand, just as long as it is a reputable brand. We hope this helps. Regards, Nicholas Kowald Customer Service Representative Ford Customer Relationship Centre (: 13 36 73 (13 FORD) Fax: 03 9929 3175 .: nzkowald@fordcrc.com.au For the latest updates, visit www.ford.com.au -----Original Message----- Sent: Tuesday, 3 June 2003 14:19 To: Kowald, Nicholas Subject: RE: BA Falcon XR6T Enquiry Nicolas Thanks for your reply. Is Castrol GTX3 10W-30 suitable? And which type of oil in the Castrol range is suitable? The reason I forward this query to Ford Motor Co, is because the Service Dept of dealership were not helpful. Thanks -----Original Message----- From: Kowald, Nicholas [mailto:nzkowald@fordcrc.com.au] Sent: Tuesday, 3 June 2003 2:14 PM Subject: BA Falcon XR6T Enquiry Dear Thank you for your email to the Ford Customer Relationship Centre. We can advise that the Engine Oil Specification for the Falcon XR6 Turbo is SAE 15W-40. This is for optimum fuel economy. We suggest if you have any further enquiries to contact your local Ford Dealership. Regards, Nicholas Kowald Customer Service Representative Ford Customer Relationship Centre (: 13 36 73 (13 FORD) Fax: 03 9929 3175 .: nzkowald@fordcrc.com.au For the latest updates, visit www.ford.com.au