In a warm climate you can.
Yes, if you live in a hot climate.
You are best to use a semi-synthetic oil. Preferably 10W40.
The 2003 Subaru thermostat is located inside of the thermostat housing, on the front of the engine. The thermostat will be near the bottom of the engine.
P1507: Idle Control System Malfunction(Fail Safe). As per Subaru Trouble Code Info.
belt
10W40
10w40 in summer and 10w30 in winter. Any heavier oil will cause lifter noise. I have also found the engine on 10w40 will only tolotare about 1/2 quart of lucas oil.
10w40 or 10w30
5w30 in winter 10w40 summer 5w30 from 0 to 90 degrees over 90 use 10w40
In those years..they used 10w40.
You can used 10w30 or 10w40
10w30 or 10w40
Europe: Germany INEO ECS 5W30 / 9000 Energy 0W30 / 9000 5W40 / 7000 10W40 Diesel: 7000 10W40 Austria INEO ECS 5W30 / 9000 Energy 0W30 / 9000 5W40 / 7000 10W40 Diesel: 7000 10W40 Belgium INEO ECS 5W30 / 9000 Energy 0W30 / 9000 5W40 / 7000 10W40 Diesel: 7000 10W40 Bosnia INEO ECS 5W30 / 9000 Energy 0W30 / 9000 5W40 / 7000 10W40 Diesel: 7000 10W40 Bulgaria INEO ECS 5W30 / 9000 Energy 0W30 / 9000 5W40 / 7000 10W40 Diesel: 7000 10W40 Cyprus INEO ECS 5W30 / 9000 Energy 0W30 / 9000 5W40 / 7000 10W40 / 7000 15W50 Diesel: 7000 10W40 Croatia INEO ECS 5W30 / 9000 Energy 0W30 / 9000 5W40 / 7000 10W40 Diesel: 7000 10W40 Denmark INEO ECS 5W30 / 9000 Energy 0W30 / 9000 5W40 / 7000 10W40 Diesel: 7000 10W40 Spain INEO ECS 5W30 / 9000 Energy 0W30 / 9000 5W40 / 7000 10W40/ 7000 15W50 Diesel: 7000 10W40 Estonia INEO ECS 5W30 / 9000 Energy 0W30 / 9000 5W40 / 7000 10W40 Diesel: 7000 10W40 Finland INEO ECS 5W30 / 9000 Energy 0W30 / 9000 5W40 / 7000 10W40 Diesel: 7000 10W40 Great Britain INEO ECS 5W30 / 9000 Energy 0W30 / 9000 5W40 / 7000 10W40 Diesel: 7000 10W40 Greece INEO ECS 5W30 / 9000 Energy 0W30 / 9000 5W40 / 7000 10W40/ 7000 15W50 Diesel: 7000 10W40 Holland INEO ECS 5W30 / 9000 Energy 0W30 / 9000 5W40 / 7000 10W40 Diesel: 7000 10W40 Hungary INEO ECS 5W30 / 9000 Energy 0W30 / 9000 5W40 / 7000 10W40 Diesel: 7000 10W40 Italy INEO ECS 5W30 / 9000 Energy 0W30 / 9000 5W40 / 7000 10W40 Diesel: 7000 10W40 Ireland INEO ECS 5W30 / 9000 Energy 0W30 / 9000 5W40 / 7000 10W40 Diesel: 7000 10W40 Iceland INEO ECS 5W30 / 9000 Energy 0W30/ 9000 5W40/ 7000 10W40 Diesel: 7000 10W40 Latvia INEO ECS 5W30 / 9000 Energy 0W30 / 9000 5W40 / 7000 10W40 Diesel: 7000 10W40 Lithuania INEO ECS 5W30 / 9000 Energy 0W30 / 9000 5W40 / 7000 10W40 Diesel: 7000 10W40 Macedonia INEO ECS 5W30 / 9000 Energy 0W30 / 9000 5W40 / 7000 10W40 Diesel: 7000 10W40 Malta INEO ECS 5W30 / 9000 Energy 0W30 / 9000 5W40 / 7000 10W40 / 7000 15W50 Diesel: 7000 10W40 Moldova INEO ECS 5W30 / 9000 Energy 0W30 / 9000 5W40 / 7000 10W40 Diesel: 7000 10W40 Norway INEO ECS 5W30 / 9000 Energy 0W30 / 9000 5W40 / 7000 10W40 Diesel: 7000 10W40 Poland INEO ECS 5W30 / 9000 Energy 0W30 / 9000 5W40 / 7000 10W40 Diesel: 7000 10W40 Portugal INEO ECS 5W30 / 9000 Energy 0W30 / 9000 5W40 / 7000 10W40 Diesel: 7000 10W40 Czech Republic INEO ECS 5W30 / 9000 Energy 0W30 / 9000 5W40 / 7000 10W40 Diesel: 7000 10W40 Rumania INEO ECS 5W30 / 9000 Energy 0W30 / 9000 5W40 / 7000 10W40 / 7000 15W50 Diesel: 7000 10W40 Russia INEO ECS 5W30 / 9000 Energy 0W30 / 9000 5W40 / 7000 10W40 Diesel: 7000 10W40 Slovenia INEO ECS 5W30 / 9000 Energy 0W30 / 9000 5W40 / 7000 10W40 Diesel: 7000 10W40 Slovakia INEO ECS 5W30 / 9000 Energy 0W30/ 9000 5W40/ 7000 10W40 Diesel: 7000 10W40 Sweden INEO ECS 5W30 / 9000 Energy 0W30 / 9000 5W40 / 7000 10W40 Diesel: 7000 10W40 Switzerland INEO ECS 5W30 / 9000 Energy 0W30 / 9000 5W40 / 7000 10W40 Diesel: 7000 10W40 Turkey INEO ECS 5W30 / 9000 Energy 0W30 / 9000 5W40 / 7000 10W40 / 7000 15W50 Diesel: 7000 10W40 Ukraine INEO ECS 5W30 / 9000 Energy 0W30 / 9000 5W40 / 7000 10W40 Diesel: 7000 10W40 Serbia-Montenegro INEO ECS 5W30 / 9000 Energy 0W30 / 9000 5W40 / 7000 10W40 Diesel: 7000 10W40
Mobil 1 10w40 very high performance is the best oil to use unless you have very high mileage in which case use 15w40.
I always used 10w30 or 10w40 Castrol Oil.
put in 10w40 synthetic or 10w40 conventional
standard oil used for the 3.5 High Output engine is 10w40.