3 gallons of oil * . 05 (percentage of fuel in the oil) = 0. 15 gallons.
Less than a quart of diesel over at lest 3000 miles.
So, if the level is an inch over full after service, it is not likely fuel. That would be obvious in the dealers test.
Since the oil filter is new, just change the oil yourself without changing the filter, using the venting technique, and see what the level does. If you have the stuff for samples, one oil change shouldn't be too bad.
I admit the dealer should be doing this stuff, or at least be doing something.
Was this your first oil change? First at this dealer?
Less than a quart of diesel over at lest 3000 miles.
So, if the level is an inch over full after service, it is not likely fuel. That would be obvious in the dealers test.
Since the oil filter is new, just change the oil yourself without changing the filter, using the venting technique, and see what the level does. If you have the stuff for samples, one oil change shouldn't be too bad.
I admit the dealer should be doing this stuff, or at least be doing something.
Was this your first oil change? First at this dealer?