Synthetic Oil vs Non Synthetic - Kia Forte Forum : Sedan / Koup / Forte5 Forums
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post #1 of 17 Old 08-01-2016, 06:58 PM Thread Starter
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Synthetic Oil vs Non Synthetic

Hello
i bought a 2010 kia forte koup ex, and i need and oil change on it but even from the owners manual i cant figure out if i need Synthetic or non. is there any proven differences between synthetic as well?
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post #2 of 17 Old 08-01-2016, 07:16 PM
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get whatever oil you want as long as it meets the specs in the owners manual.
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post #3 of 17 Old 08-01-2016, 08:58 PM
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You can use either. There have been a few studies showing conventional and synthetics ranking amongst each other in wear protection. As said above get whatever you want as long as it meets the recommended specs.

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post #4 of 17 Old 08-03-2016, 07:35 PM
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https://www.youtube.com/watch?v=D5SngB0mAUQ

For what it's worth I run Mobil 1 extended performance in my cars, my Forte will be exception, but you can use whatever suits you so long as it meets the requirements.
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post #5 of 17 Old 08-03-2016, 09:47 PM
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Saw this video a while ago and it seems to be relevant here.

https://www.youtube.com/watch?v=tYkg0oDUXs8

Again, get what the manual recommends.


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post #6 of 17 Old 08-03-2016, 10:31 PM
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Quote:
Originally Posted by Falcon1986 View Post
Saw this video a while ago and it seems to be relevant here.

https://www.youtube.com/watch?v=tYkg0oDUXs8

Again, get what the manual recommends.
That Youtube channel is very insightful for those that need automotive explanations! Definitely recommend it


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post #7 of 17 Old 08-09-2016, 07:32 PM
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I have a friend whose wife works for Valvoline.

She is in an R&D Department. When I asked her opinion about it, she said that refining techniques and additive packages have gotten so good for dino oil, that there really isn't a big difference for use in our daily drivers.

So, she says what everyone else here has. Get what meets the specs in the owners manual.
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post #8 of 17 Old 08-10-2016, 06:22 PM
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Since used oil analysis is what I do for a living, I can say a few things on this.

Any oil that meets the minimum API requirements from Kia will work fine for pretty much the standard interval depending on driving style. Driving style has a tremendous effect on oil life and the type of oil neede to run extended drain intervals.

I've been running a little experiment with our personal vehicles and Walmart's full Synthetic 5W20. In the Forte, after a full season of auto-x I can get just shy of 10k miles out of the oil before the base has dropped and the accumulated wear starts to add up. With the wife's older Iron block Rio, she saw just shy of 12k miles on that last change. I test every 3-5k like I would have changed and determine whether to change on the results. It's really quite amazing the quality of $17 for a 5-qt jug oil.
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post #9 of 17 Old 08-10-2016, 09:55 PM
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You know, for some reason I've never really even given Wal-Mart's Super Tech a thought for oil in my cars. I just assume it's super cheap not up to par type stuff, I've never actually even gave the bottles much of a look.

Having read around the internet on it a few minutes I may be mistaken. Guess it's all marketing hype from other companies that make me automatically assume Super Tech must not be any good.

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post #10 of 17 Old 08-11-2016, 08:27 AM
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That makes me feel better about going 7500 miles between changes with Mobil One. I drive about 30k per year, so it gets changed about every 3 months. With my 2011 Forte, I went 10k between changes, but with the higher stressed turbo engine, I figured I should change it a little sooner.

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post #11 of 17 Old 08-11-2016, 09:51 AM
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Quote:
Originally Posted by Walpole5 View Post
That makes me feel better about going 7500 miles between changes with Mobil One. I drive about 30k per year, so it gets changed about every 3 months. With my 2011 Forte, I went 10k between changes, but with the higher stressed turbo engine, I figured I should change it a little sooner.
So, with Kia specifying the OCI at 5K, you're not concerned about the possibility of them voiding the powertrain warranty? Don't have any first-hand experience with turbos, but I keep seeing more and more stuff about needing to change the oil in these engines more frequently. Oil washing appears to be the most frequent issue being mentioned.
Not saying what you're doing is wrong - just passing along what I've been reading.

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post #12 of 17 Old 08-11-2016, 02:10 PM
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Just follow whatever the user manual states regarding type of oil and oil change intervals. Regular oil is fine and there is no need to put in full synthetic oil unless your car calls for it. Keep in mind it is a Kia, not a Rolls.
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post #13 of 17 Old 08-12-2016, 11:49 AM
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Here's the last analysis on hte Rio:


The latest is the sample on hte bottom. Lots of colors, but if you're trying to get the most out of your oil and not changing it too soon, you want to see those on the right places.

HEre's the last on the Forte pre-tune:

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post #14 of 17 Old 08-12-2016, 11:53 AM
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Quote:
Originally Posted by Walpole5 View Post
That makes me feel better about going 7500 miles between changes with Mobil One. I drive about 30k per year, so it gets changed about every 3 months. With my 2011 Forte, I went 10k between changes, but with the higher stressed turbo engine, I figured I should change it a little sooner.
Honestly, I would do a couple samples at 3k and 5k to make sure that it's acceptable before I went that route. We are definitely seeing the GDI engines (not just Kia, but across the board everyone) having exceptionally high fuel dilution and thinning out the oil rather quickly. I'm going to point any out by name, but one particular brand with a blue oval on them that put turbo GDI V6's in full size trucks are having 5%+ at 1500 miles and the 30 weight oils thinned to less than 20 weight in 3k miles.

Some oils handle fuel dilution better than others. So it really boils down to are you testing and what is that telling you?
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post #15 of 17 Old 08-12-2016, 12:09 PM
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Our 2016 Audi has 10k mile oil change intervals. I felt that 7500 with the Kia and using synthetic was pretty safe.

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