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3.7 qt
10w 30 SF motor oil
3.5 quarts, approximately.
3.7 quarts.
Drive to your nearest auto parts store. They can tell you exactly what filter to buy.
The type of oil needed for a 1990 Honda CRX Si with the 1.6 liter engine is 10 W 40 or 10 W 30. The oil can be purchased at any auto parts store.
SAE 5w30 is what Honda recommends. So that is what you should use.
Can you? Sure you can. Should you? No, you should not. The recommended weight oil for a 1997 Honda Accord is SAE 5w30. Use only that weight in conventional or synthetic.
The correct weight which should be 5w20 is listed in your owner's manaul.
hondahookup.com has manuals u can download with the info u need
http://www.youtube.com/watch?v=osn-bAonkVA
10w 40