I have been running the Mobil 1 MXT 10-40 in my 964 for the past year. It's been using a bit of oil so I want to top it up but I am out of the MXT oil. What 'regular' Mobil 1 product should I use if I need to add a couple quarts before the next oil change?
I am up to about 7000 miles since the last oil change...Think this is bad?
Will be changing in the next couple months.
TIA
