Oil change issue...

Just got the oil changed for the first time on my 06 Si.
When I got home, I looked at the receipt and noticed that they used 5w20 instead of 5w30. it's not like it's printed on the oil cap or anything...
Anyhow, I am going back tomorrow to make them do it right, but just for the interest of information, what would the negative effect of 5w20 be on the engine? Is it too thin for the performance motor?
Thanks for whatever info I get...
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Joseph M. LaVigne
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Joe LaVigne wrote:

    There is a difference, but you can't measure it. bob
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5w20 is the correct oil for most hondas.
Joe LaVigne wrote:

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http://www.carkb.com/Uwe/Forums.aspx/honda-cars/200609/1
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On Fri, 01 Sep 2006 12:21:14 GMT, loewent via CarKB.com wrote:

But not for the Si...
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Joseph M. LaVigne
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Joe LaVigne wrote:

check the owner's manual.
bob z.
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On 1 Sep 2006 06:10:44 -0700, snipped-for-privacy@gmail.com wrote:

I did. I didn't ask what the correct oil was, I asked what the effect of using the wrong one is...
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Joe LaVigne wrote:

Does the Si call for 5W-30? Honda is a little confusing in that they spec 5W-20 for most engines, but 5W-30 for some. I know that my Acura TSX calls for 5W-30 while the Accord says 5W-20. This makes me think that 5W-20 is borderline for Honda designs and that the high compression versions of their engines need 5W-30 for protection in extreme conditions.
Remember that the oil has to be ready to handle mountain climbing with a full load on the hottest summer day.
That said, if your Si calls for 5W-30 and they put in 5W-20 I would not be worried about it unless you have been doing full throttle blasts up a mountain range in 110 deg F conditions ... but I would make the dealer fix it.
Personally I am running 5W-30 in the summer in our Accord and only using 5W-20 in the winter.
John
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On Fri, 01 Sep 2006 14:56:41 GMT, John Horner wrote:

Yeah, the Si calls for 5w-30...

I didn't use the dealer, and will likely not for most stuff, as they are not all that close, are a bit pricey, and are very difficult to get convenient appointments with. On the other hand, had I used a dealer, I probably wouldn't have had this problem... ;-)
The oil change place (A Valvoline Instant Oil Change, which is the best around these parts usually) will be fixing it Tuesday. They offerred sincere apologies...
Thanks for the help!
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Joe LaVigne wrote:

Ah, that explains it. They probably just looked up Honda Civic in the book or computer and it said to use 5W-20. I'm not surprised that a quick lube place missed the Si nuance.
Personally I would much rather do my own oil changes than trust the quick lube types, but to each their own.
John
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Joe LaVigne wrote:

a good quality 5w-20 is just dandy. i've used 5w-20 castrol in an older honda and oil consumption was almost zero compared to the same brand 5w-30. that indicates better quality base oil so i don't think there's anything to be afraid of.
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Is the last sentence above sarcasm? In other words, does your Civic SI's oil cap actually have "5W30" printed on it?
When posting to a technically oriented newsgroup, may I suggest leaving out the sarcasm, to expedite communications and quickly get you what you want?
As others have pointed out, a number (all?) of the more recent Honda models specify 5W-20. I can't get a 2006 Civic Si owner's manual online at the moment, but the 2006 Accord owner's manual and the 2005 Civic SI owner's manual specify 5W-20.
Time to break open and read your very own owner' manual. :-)
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wrote

I just got back from the Honda dealer, and noticed on the chart on the counter that the 2006 Civic is the only 21st Century Honda to take 5W-30 instead of 5W-20. Well, the Insight takes 0W-20. Weird, huh?
Mike
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message wrote

Yessir. There has to be a rational explanation for the discrepancy, either in engine design, or perhaps Honda changed its mind mid-production.
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Michael Pardee wrote:

All of the Acuras call for 5W-30 even when similar engines in Honda are specified for 5W-20. I have always thought that this might be due to the higher compression ratios generally used in the Acura engines. High compression ratios mean higher bearing loads.
Perhaps the 2006 Si uses an engine tuned more like an Acura motor.
John
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On Sat, 02 Sep 2006 02:53:37 GMT, John Horner wrote:

IIANM, the 06 Si uses almost the same engine as the 05 RSX. It is tweaked some, and gets slightly better performance, but a picture of the engine is damned near a carbon copy of what's under my hood...
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Joe LaVigne wrote:

I suspect you are right. Honda makes many variations on it's basic designs and seems to specify 5W-30 for the higher performance versions.
John
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On Fri, 01 Sep 2006 15:33:20 GMT, Elle wrote:

I thought it was an excellent use of sarcasm... ;-)
Yes, it says 5w-30 on it...

The 2005 Si was, respectfully, a dog. The engine in the 06 is much better, and more demanding, I think, thus the recommendation of 30, I assume. I am not, however, a mechanic. I know enough to keep a car running well, and can repair most basic problems, but I am no expert...

Done it... Actually read through it when I got the car, and made notes of noteables... ;-)
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Thanks for clarifying, Joe, and offering your opinion on the distinction between the '05 and '06 Sis, to help explain the difference in oil recommendations.

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On Sun, 03 Sep 2006 05:36:31 GMT, Elle wrote:

No problem.
And also, besides being a dog, the damned gear shifter was in a funny place... ;-)
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