My mom's car is a 2000 Jaguar XJ8 that recommends 1year/12k miles oil changes! With the type of driving she does I told her to change it more often. The dealer said they put synthetic in the engine everytime there is an oil change done (no idea what kind, I will call and find out soon). What does everyone suggest? The filter according to my mom's invoice after getting her oil changes there said the filter was $15! The oil I belive was $5 a quart and needed 8 quarts (how much does this car really need?). The best was the drain plug gasket costs over $3! Enough to say I will be doing the rest of her oil changes for her. Now back to the oil suggestions this car does not get many miles put on it as my mom works less than 3 miles from our house so the car raley gets warmed up (although I advise her to let it warm a little for the oils sake). It does get highway miles etc whenever she goes somewhere. What oil should I be putting in this car? I'm guessing Mobil 1 10w-30 would be good or perhaps Redline if I'm going the extended drain intervals. What filter? Mobil 1 sounds nice, but I'm curious asto who manufactures the Jaguar filter.