Yes! Use castrol synthetic oil and you'll all so get better performance and best of all better gas mileage! Don't forget to change the filter.
Miller CFS 10w60 Fully Synthetic ..
The oil sending unit on a 2002 wrx subaru is almost under the alternator. I suggest you remove the alternator and it is easier to remove the oil sending unit.
If it is the synthetic blend, you should change the oil every 3,000 miles. If it is a full synthetic, you should change the oil every 5,000 miles.
4.8 quarts
5w40 elf excelium or Renewable resources 5w40HD
It is located under the alternator.
That would be to a Subaru WRX (2005)
mobil one fully synthetic
Synthetic 5w-30
The 2008 Subaru WRX typically requires about 5.1 quarts (approximately 4.8 liters) of engine oil for an oil change, including the oil filter. It's always a good idea to check the owner's manual for specific recommendations and to verify the exact amount needed based on your model's configuration.
How hard are you driving it? How often do you change the oil? What climate are you driving in? etc.? etc.?
15w/40w synthetic