Stupid Oil Question
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This is a discussion on Stupid Oil Question within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; My car has about 10k miles on it, and I always keep it garaged. It's gone through 3 oil changes ...

  1. #1
    Registered User TurnWRX's Avatar
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    Stupid Oil Question

    My car has about 10k miles on it, and I always keep it garaged. It's gone through 3 oil changes so far, the first two with 5W30. The third was with 10W30. I just went to my local Costco store and all they had was 5W30 oil. I bought it.

    My question is, would there be anything wrong going from 10W30 back to 5W30?

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  3. #2
    He simply abides. SD_GR's Avatar
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    Not a problem.

    If you are in the south CA and you do not ski or live in the mountains, so you never see very cold weather, you don't need to worry about a 5W oil, but using one will not hurt you either. At worst it'll increase your apparent oil consumption -- and I can't predict how much unless you're using M1 (in which case I'd guess by 300 ml per 3K miles or so based on my own experiences).
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