10w40 or 10w30
You can use API GL-4, SAE 75W90 semi synthetic for your Galant. There are standard types of oil used in these types of cars.
5W 20
Yes
The suggested motor oil for a 1997 Mitsubishi Galant is a light 5W30 conventional oil. Older engines made need a little heavier oil to prevent leaking.
Engine Oil - use with API certification Transmission Oil - Used OEM Mitsubishi Transmission Oil Only.
Excessive engine wear? Oil pump weak? Incorrect grade of oil?
5W30
5w-30 or 10w-30 if higer miled
The manufacturer recommends using 10W-30 weight oil in the 2002 BMW. A heavier motor oil can be used in extreme climates.
If you go to an auto parts store or call and tell them what type of car you have they can tell you.
It is Mobil 424. Kawasaki sells it as a wet brake oil un their own brand but it is the same oil used in tractor brakes.
Use SAE 5w20 High Mileage Oil any major brand.