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wrong oil weight

 
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Old 16 Mar 2011, 10:22 am
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Default wrong oil weight

Oh gosh, I guess I had a major brain freeze when I had my oil changed at the end of December. I had them put in 10-30 not 5-30. My car is running good (but seems to be using oil lately. Should I have it changed again to the correct weight?
My poor little car, I'm a bad mammy

oh, I should say I found the container, that's how I realized what I'd done.
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Old 16 Mar 2011, 10:31 am
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Default Re: wrong oil weight

Oil weight makes little difference.
Cold starting is about it, thicker oils offer more protection when oil gets
very hot or is subjected to extremes

Everyone freaked, and I mean freaked when the industry went to 5W-30,
they made up some BS about 'piston-ring sticking' or something, although
they were exactly the same engines that'd been run on 10W-40 for decades

You can run 5W-30 to 20W-50 or straight 40W, without issues.
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Old 16 Mar 2011, 01:35 pm
edb edb is offline
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Default Re: wrong oil weight

no big deal. I once run 10W-30 in my HHR for a winter, it should be 5W-30. Two years later now, nothing went wrong.

There is virtually no difference between 5W-30 and 10W-30 at normal operation temperature; but when it's cold, 5W-30 is less viscous, or thinner, than 10W-30. In warm days, 10W-30 can be used as direct replacement of 5W-30.

Since the coldest days were already gone by now, if (a big if) there is any bad effect of using 10W-30, it already happened. Changing it back won't reverse it; in the following warm days, 10W-30 is perfectly fine, so you don't have to change it back. If (another big if) I were you, I won't worry about it at all.
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Old 16 Mar 2011, 01:54 pm
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Default Re: wrong oil weight

I've used Amsoil 10w40/zinc all year round since my first oil change back in 2004. Of course I live in sunny Tampa Bay.

Jerry
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Old 16 Mar 2011, 01:58 pm
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Default Re: wrong oil weight

they covered it pretty good i run a 10w40 in the summer and a 10w30 in winter all is well
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Old 16 Mar 2011, 07:28 pm
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Default Re: wrong oil weight

10W-40 Old timers
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Old 16 Mar 2011, 07:46 pm
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Default Re: wrong oil weight

10w40 is the lightest synthetic You can get from Amsoil with the zinc in it. HAD to have the zinc, plus I wanted at least the 40 for the Florida summers.

Jerry
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Old 16 Mar 2011, 11:26 pm
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Default Re: wrong oil weight

Zinc ?????
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Old 17 Mar 2011, 10:55 am
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Default Re: wrong oil weight

what does zink do and why is it important??

oh and uptown I am OLDER than dirt some days anyway
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Old 17 Mar 2011, 03:19 pm
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Default Re: wrong oil weight

Zinc, actually ZDDP is necessary in older engines that don't have roller cams. The ZDDP lubricates sliding forces needed with flat tappet cams and without it the cam can wear very quickly.
The ZDDP in almost all motor oil has been reduced to almost nothing in an effort to cut pollution more with no regard to all the older vehicles out there that need it.
It can be found as an additive and the hot-rodder types use to keep from destroying our motors.....
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