Andy Rogers
Member II
I noticed that the user manual for the Universal M40 in my 1984 E-38 calls for 10W40 motor oil. However, I noticed a half full bottle of 15W40 left over from the spring commissioning my marina did so I'm guessing that's what they used.
Should I worry? If I need to add more should I go with 10W40 or 15W40? Or should I drain all the oil and start over with a clean fill of 10W40?
Thanks,
Andy
Should I worry? If I need to add more should I go with 10W40 or 15W40? Or should I drain all the oil and start over with a clean fill of 10W40?
Thanks,
Andy