Just changed the oil after a 5K OCI with Castrol Edge and noticed a light varnish on the dipstick that wasn't there before. I'm wondering what could have caused this? The car has seen pretty much only 5-6K OCI's with synthetics. The staining is on both ends. However, the fill hole still looks clean and shiny.
I check the oil every couple of weeks or so and hadn't noticed this before?
The current fill of Schaeffer 5w40 has 250 miles on it. Waiting to see if it lightens/disappears.
Here's a pic:
I check the oil every couple of weeks or so and hadn't noticed this before?
The current fill of Schaeffer 5w40 has 250 miles on it. Waiting to see if it lightens/disappears.
Here's a pic: