I am sorry to drag the "change oil" question up once again but, I searched and couldn't find a straight forward answer.
I changed the oil in my '51 1/2 ton when I decided to do a bit of a restoration which is now 18 months ago . The truck has been sitting and has only been driven about 10 miles to the body shop and back with occasional warm up in the driveway.
Do I need to change the oil and filter or is the oil still OK?
It looks like the day I put it in. Has it deteriorated badly?
Thanks.
