I have recently aquirred a 84 VW Rabbit with the 1.6 litre diesel and 4 speed stick. It has 112,500 miles, bought with 110,000 miles, has had M1 5W-30 and Parts Master filter since 110,000. It has only used less then a pint of oil since I have owned it. Added M1 T&S 5W-40 about 250 miles ago. It doesn't leak any oil. I plan on dumping it at 113,000 miles. I was wondering what syn. oil to use and how long to keep it. I would also like to know what filter is best to use.