5w-30 oil vs. 5w20 - Chevy Colorado & GMC Canyon

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Old 01-26-2009, 05:38 PM   #1 (permalink)
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Default 5w-30 oil vs. 5w20

I know our trucks call for 5w-30 oil, but could I use 5w-20 with no negative effects? I accidently bought 5w20, and drained the oil in my truck before I noticed. Bonehead move I know. Could I run with the 5w-20 until my next oil change interval? I live in the south, so freezing temps are not a worry. I do tow with my truck on occaision (about 4000 lbs).

I've looked all over the web, and I've seen arguments for and against this. Let me know what you all think.

Thanks.
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Old 01-26-2009, 05:44 PM   #2 (permalink)
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Default Re: 5w-30 oil vs. 5w20

Yeah it should be fine just keep an eye on your Engine temp if the outside temp is hot, other then that your fine.
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Old 01-26-2009, 05:52 PM   #3 (permalink)
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Default Re: 5w-30 oil vs. 5w20

Thanks a lot.
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Old 01-26-2009, 11:05 PM   #4 (permalink)
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Default Re: 5w-30 oil vs. 5w20

I'd go and get the proper oil personally. No sense in blowing a $7-10k motor over $20 in oil.
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Old 01-27-2009, 11:13 AM   #5 (permalink)
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Default Re: 5w-30 oil vs. 5w20

Thanks RangerBob. You make a great point. Out of curiousity, do you know what the difference is anyway between 5w30 and 5w20?

Thanks again.
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Old 01-27-2009, 11:34 AM   #6 (permalink)
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Default Re: 5w-30 oil vs. 5w20

at operating temp the 5w20 is thinner.
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Old 01-27-2009, 11:34 AM   #7 (permalink)
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Default Re: 5w-30 oil vs. 5w20

the 5w20 will be thinner at operating temperature than the 5w30
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Old 01-27-2009, 03:16 PM   #8 (permalink)
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Default Re: 5w-30 oil vs. 5w20

With the oil being thinner at operating temp, I guess the risk is reduced protection?
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Old 01-27-2009, 03:26 PM   #9 (permalink)
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Default Re: 5w-30 oil vs. 5w20

Yes.
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Old 01-27-2009, 09:33 PM   #10 (permalink)
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Default Re: 5w-30 oil vs. 5w20

Quote:
Originally Posted by ColoradoKid08
Yeah it should be fine just keep an eye on your Engine temp if the outside temp is hot, other then that your fine.
The running engine temp is considerably warmer than any outside temp. What difference would the outside temp make when the engine is at operating temperature that could ever make the oil OK to use? Better than no oil I would admit.
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