Unthinkable oil proposal

[Ciao]

I left the oil for 14 months in my Audi after driving it 3K miles not driven much. After a year with fewer than 5K miles, I changed it and looked brownish. It is a turbo and I use 100% synthetic. I wil never go over 1 year without changing the oil regardless of mileage. I drive my P car less than 2K miles/year and always change the oil 100% synthetic M1 0-40W before storage--6 months in storage.

[Qingdao]

Change oil based on age; change filter based on mileage. Thats my $.02.

2k miles that filter hasn't filtered anything, but the oil has degraded some.

I change the oil on my bike every year before winter storage regardless of mileage. And then I change it after about 1000 miles of ride time in the spring. I change the filter on the bike every 4000 miles (Honda recommended interval). All my other engines (except the lawnmower) get run year round. I guess that puts me in the change the oil side of the argument.