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Old 08-25-2009, 05:26 PM   #1
ResQman
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Default OOPS! Put in 5W-30 instead of 5W-20

Stupid me. I thought it was 5W-30. Well, I changed my oil and used Mobil-1 5W-30. I should have used 5W-20. I called Ford and they said unless I was going on a long trip, it should be no problem. I have always used Mobil-1.

Opinions? Should I drain it and put in 20 weight? I don't live in a overly hot climate, 25 Celsius, so I don't think it should be a big deal.
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Old 08-25-2009, 05:38 PM   #2
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you will be perfectly fine. 5w30 is what i use. my GT likes it better than the 5w20. i was getting some blowby with the 5w20 mobil1 until i switched to 5w30 mobil1. now no blowby. it runs perfect. i wont change back.
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Old 08-25-2009, 05:45 PM   #3
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It's not gonna hurt anything to run 5W30 though technically it doesn't meet the warranty requirements.
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Old 08-25-2009, 05:47 PM   #4
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You should be fine. In the very warm climates like Hawaii I'd probably run the 5W-30 as well but in Alberta I would stick with the 5W-20 as my full time oil.
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Old 08-25-2009, 07:35 PM   #5
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+1 on being ok. There are quite a few GT owners here that use 5W30 instead of 5W20.
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Old 08-25-2009, 08:01 PM   #6
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If you're really anal about your car like I am you could always drain, the refill. But it will cost you extra $. Your car will run fine with the 5w30. Just becareful about labels in the future!
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Old 08-25-2009, 08:09 PM   #7
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You should be fine.
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Old 08-25-2009, 09:54 PM   #8
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I've been running 5w-30 for MANY thousands of miles now. It's all good. I got it b/c here in Tx it gets a little warmer than it does in Detroit.
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Old 08-25-2009, 09:54 PM   #9
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you'll be fine, ford specs 5-20 for CAFE reasons
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Old 08-25-2009, 09:59 PM   #10
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What is it about 5w-20 that satisfies CAFE shenanigans?
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