Got to my nearest Kubota dealer and puchased an oil filter and 6 litres of engine oil. The cold weather has set here in New Brunswick , Canada, and good clean oil is how I keep my1986 L2250 tractor running in the winter. She's got 2170 hrs, and has never been in a tractor shop. I installed a in- line heater when it was new, in the winter, it goes down to minus 10 or 20 degrees celsius, I'll plug it for 15 min. and starts like summer. Had a few issues with the charging system, but that's fixed.