Originally Posted By: navcanman
New to me 1997 Jaguar XJR 4.0 litre Supercharged Straight Six 322 Horsepower. Pleasure only use 6 months out of the year 2 to 4 thousand kms a year thinking rotella t6 5w40 or maybe mobil 1 15w 50 any thoughts
I use M1 10/30 in the 6 litre V12 in my Xj12, whatever synthetic 5/30 I can get on sale in the V8 in the Xj8, and when I had Xj's with the straight 6 AJ6 engine, I used 10/30. 50 weight oil is unnecessary.
I've had a lot of Jaguars, and they are not picky about oil. Congrats on your XJR.