I was rushing to top up my oil in my 1985 300TD, in a poorly lit garage, and I accidentally added probably about a half a cup of transmission oil before I realized what it was.

I then proceeded to add about another half a pint of proper engine oil.

What do you think. How bad is it to have that small amount of tranny fluid in the engine?

Better I do an oil and filter change now? Im due for one in about 2 months (or perhaps 1000 miles.) could it wait you think?

Thanks