Question about 1994 BMW 5 Series

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Castrol GTX 20W-50

Is this engine oil suitable for 1994 525i it says it Meets APL SL\CF.
Exceeds APL SL high temperature test

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Basically those numbers mean it is 20 weight oil when it is cold and 50 weight when it is hot. it should be fine for that motor tho i would recommend 10w30. with the heavier oil you should find the motor quieter tho in extreme cold temperature it will be harder to turn over.

Posted on May 24, 2009


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If you stay with better oils such as Castrol, Quaker State, Valvoline etc. You will have no problems. (especially because in your area you don't go from sub zero to 100's).
Don't forget to add a quality filter to your oil changes. This is as important as your oil!!!
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