From the Amsoil site:
2003 JAGUAR S-TYPE 4.2L 8-cyl Engine Code AJ34 (SC)
Engine Oil
Grade 1......API*
Series 2000 Synthetic 0W-30 Motor Oil
Synthetic 5W-40 European Engine Oil
SAE 10W-40 Synthetic High Performance Motor Oil
SAE 5W-30 XL Synthetic Motor Oil
-30 To 50°F......0W-30, 5W-30, 0W-40, 5W-40
You can stick to your owners manual and use the 5W30XL or the European oil. Or use the 10W40 for up to 25,000 miles or the 0W30 for up to 35,000 miles or 1 year whichever comes first. Change your filter according to the longest interval in your owners manual.
Your car takes 6.4 quarts. If you pay MSRP for the oil, 7 quarts of the XL would be about $42, the Euro $52.50, 10W40 is $50.75, the 0W30 is $69. Since you live in Dallas you can pick up at the warehouse or have shipped to your house for $9. Or you save more by ordering a case or become a Preferred Customer. Contact a site sponsor for details.
2003 JAGUAR S-TYPE 4.2L 8-cyl Engine Code AJ34 (SC)
Engine Oil
Grade 1......API*
Series 2000 Synthetic 0W-30 Motor Oil
Synthetic 5W-40 European Engine Oil
SAE 10W-40 Synthetic High Performance Motor Oil
SAE 5W-30 XL Synthetic Motor Oil
-30 To 50°F......0W-30, 5W-30, 0W-40, 5W-40
You can stick to your owners manual and use the 5W30XL or the European oil. Or use the 10W40 for up to 25,000 miles or the 0W30 for up to 35,000 miles or 1 year whichever comes first. Change your filter according to the longest interval in your owners manual.
Your car takes 6.4 quarts. If you pay MSRP for the oil, 7 quarts of the XL would be about $42, the Euro $52.50, 10W40 is $50.75, the 0W30 is $69. Since you live in Dallas you can pick up at the warehouse or have shipped to your house for $9. Or you save more by ordering a case or become a Preferred Customer. Contact a site sponsor for details.