S2000 Under The Hood S2000 Technical and Mechanical discussions.

Can I mix oil viscosity?

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Old 09-30-2013, 08:13 PM
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Default Can I mix oil viscosity?

I bought my new S2000 from a dealership and before they sold it to me, they did an oil change but Idk what kind of oil they used. (100% sure its not synthetic since they put that sticker on saying to change it in the next 3,000 miles.) Since my AP1 is burning oil, I don't know what type of oil to use. I was just going to use 10w30, but I didn't know if mixing them would cause problems. I would just do an oil change but if the filter is less than 600 miles old, why bother.
Old 10-01-2013, 03:11 AM
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You can mix viscosity, but not synthetic and non synthetic
Old 10-01-2013, 09:19 AM
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You can mix all you want, I mix oil for my S and my bikes. It's an urban myth, what do you think a blended oil is? It's both mixed together but most if not all oil companies won't tell you the % of each. Most are not blended in a 50/50 mix. But if you mix it, you know what the % of the mix is.

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Old 10-01-2013, 04:24 PM
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I wouldn't do it and don't see any benefit.

I run Amsoil 0w30 in my S2k,Z06 & GST.0w20 goes in the EXV & CRV.

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Old 10-01-2013, 07:08 PM
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I don't believe you should have any issues. Just to be safe you can check the oil manufacturers website they should indicate if you can mix viscosity.
Old 10-01-2013, 07:35 PM
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Air on them putting in the proper viscosity of 10/30 and just top it off with this. The likely alternative which may have been used if they didn't bother to look at the oil cap or manual, is 5/30. At either rate, your only mixing the cold viscosity, its not going to be a problem. Running either one is fine in this car.
Old 10-04-2013, 08:49 AM
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of course you can
Old 10-04-2013, 01:13 PM
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Summer i run 10w30 and fall/winters i run 5w30 or 0w30 for better start ups during cold temps. You can run whatever you want. My s used to burn a lot a oil then i went to Pennzoil platinum and i dont burn about 1 quart in 1500 2000 miles.
Old 10-04-2013, 06:13 PM
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Originally Posted by waleed786
You can mix viscosity, but not synthetic and non synthetic
Untrue. Most Dino based oils are now a synthetic blend anyways. Even if they weren't you still could.
Old 10-04-2013, 06:17 PM
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Originally Posted by lunardeathgod
I bought my new S2000 from a dealership and before they sold it to me, they did an oil change but Idk what kind of oil they used. (100% sure its not synthetic since they put that sticker on saying to change it in the next 3,000 miles.) Since my AP1 is burning oil, I don't know what type of oil to use. I was just going to use 10w30, but I didn't know if mixing them would cause problems. I would just do an oil change but if the filter is less than 600 miles old, why bother.
As long as the oil is a decent brand and API certified you are fine.


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