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I have a Nissan Sentra 2014. I wanted to start using full synthetic oil, and the manual said I should use 0W-20. I changed both the oil and the filter (I used this one), and after finishing I realized I used 0W-30 instead.

I was thinking about changing it again tomorrow, but I'm not sure if I can use that one, and wait some miles before changing it again.

Is it serious? When should I change it? Also, should I change the oil filter again as well?

  • Where are you located? – race fever Jan 4 '16 at 0:30
  • I'm in Miami, FL – Oscar Mederos Jan 4 '16 at 0:30
  • The no, you will not have any issues. Don't worry about it. But if you can't sleep at night thinking about it then change it. :) – race fever Jan 4 '16 at 0:34
  • @racefever - Don't be afraid to use your votes and I'm not talking for me. – Pᴀᴜʟsᴛᴇʀ2 Jan 4 '16 at 0:41
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    @OscarMederos Here is the spec sheet for it. Note that it is ilsac GF-5 approved and API SN approved which are the only specs that Nissan requires. Should be fine. This is a high quality oil. mobil.com/USA-English/Lubes/PDS/GLXXENPVLMOMobil_1_0W-30.aspx – Fred Wilson Jan 4 '16 at 1:28
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This is not a serious issue. You can probably even get by using 0W-30, especially since you are in an area which is usually warm. If you were in a colder area up north somewhere, I'd highly suggest you change it out. If you do decide to change it out, don't worry too much about the filter. I'd take the filter down and drain out what's in it, but put some clean oil back on the gasket and put it back in. The little bit of leftover 0W-30 is not going to cause any issues.

One of the issues with running a heavier weight oil is that your bearing clearances are set by the factory to accept the thinner oil. By having the thicker oil in the crankcase, you run the risk of bearing damage. I think with where you live the chance is mighty small, but it's still there. If your car is really new, I'd highly suggest you change the oil out. When a car is newer, the bearing tolerances are even tighter. Seeing as how your car is a 2014, there has probably been at least three or four oil changes done to it, so it shouldn't be an issue.

  • Thank you very much. I will keep using this one then, and I will use 0W-20 next time. Since the filter isn't expensive I will also change the filter. My car has 26k miles. I bought it with 22k. I changed the oil after buying it (regular oil) and I started using full synthetic today. – Oscar Mederos Jan 4 '16 at 0:43
  • I agree it is not a serious issue. It should be noticed that multi-grades are typically "thin for grade" (on the lower end of the acceptable spectrum) at their higher end (thickness when hot). In addition, most include VII's (viscosity index improvers), and as these break down, the oil becomes thinner at the top end anyway. – kmarsh Jan 4 '16 at 14:30
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    @kmarsh - Seeing as how it's full synthetic doesn't hurt matters either. – Pᴀᴜʟsᴛᴇʀ2 Jan 4 '16 at 15:17
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It is interesting how people think they know the answers. Let's break down what oil viscosity means, and how it applies to engine use. First of all, "thicker" oil is NOT physically thicker. It is more like being more "clingy". The actual measurement of the oil molecules is pretty much the same whether 20 weight oil or 40 weight oil. It is the additives that make it thicker or thinner.

Let's use 5W30 as a reference. The 5 represents how thick the oil is cold, and as a reference, "not thicker than 5 weight oil at -40.". The "W" represents winter cold starts. So at this point whether 5 weight or 0 weight, 0 weight would give better cold start protection. The 30 represents "not thinner than 30 weight oil at operating temperatures.

The only concern for newer engines would be how the systems sensors, actuators etc would work with the different oil viscosities. For example the VVT actuators may not work as well with the different oils. Trying won't hurt except to hinder performance and fuel economy.

If you want to research, check websites that explain oil technology and be very wary of forums from people who want to give you "good advice". My advice is, if you are not sure, use manufactures recommended oil and oil change intervals.

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