Subaru 2014 Impreza Owner's Manual page 440

Alternative engine oil
If the SUBARU approved oil is unavailable, the following alternative oil can be used.
NOTE
Each quantity indicated here is only a guideline. The necessary quantity for replacement may differ slightly depending on the
temperature and other factors.
Oil grade
API (American Petroleum Insti-
tute) classification SM with the
words ENERGY CONSER-
VING or SN with the words
RESOURCE CONSERVING
or
ILSAC (International Lubricant
Specification Advisory Commit-
tee) GF-4 or GF-5, which can be
identified with the ILSAC certifi-
cation mark (Starburst mark)
SAE viscosity No. and
applicable temperature
0W-20 synthetic oil is the required oil
for optimum engine performance and
protection. Conventional oil may be
used if synthetic oil is unavailable.
*: If 0W-20 synthetic oil is not available,
5W-30 or 5W-40 conventional oil may
be used if replenishment is needed but
should be changed to 0W-20 synthetic
oil at the next oil change.
12-5
Specifications/Specifications
Engine oil capacity
Adding the oil from low level to
full level:
1.1 US qt (1.0 liter, 0.9 Imp qt)
Changing the oil and oil filter:
5.1 US qt (4.8 liters, 4.2 Imp qt)
CONTINUED