Is it ok to put shell oil 15w40 in a rave 4 toyota
1st find out what Toyota specs are , but in general , no , do not use any grade oil other the specified .
Mixng the oil grades id just wrng and will destroy your $5.000 engine over a few dollar saving...
DO NOT CHANGE THE GRADE OF OIL , USE ONLY THE RECOMENDED GRADE... THE BRAND : CASTROL GTX ONLY
most other oils are recycled garbage...
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