What does the maintenance minder say? If it indicates (for example) 60% oil life remaining I would go further. If it's down to something like 30% then I would change the oil and filter both.I'm debating this question (with myself) right now. The Mercedes has 1 year on the oil, but only about 2000 miles. Only a SINGLE long trip in all that time!
So short trips, turbo, so fuel dilution (I can smell it), all on Ravenol VST. Not 100% sure fuel dilution causes any issues though.
Pretty sure it's gotta go, but likely not change the filter.
Thoughts?