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Auto Repair Shop's Been Using the Wrong Motor Oil


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cbrown6305
New User

Oct 18, 2013, 1:44 PM

Post #1 of 6 (868 views)
Auto Repair Shop's Been Using the Wrong Motor Oil Sign In

I'm in need of some advice. I have been taking my car to the same place to get it serviced for the last year (first year of ownership). I had just taken it in and asked for oil changes without specifying what oil to use. I assumed they would know - bad assumption. They have been using regular motor oil this whole time while they should have been using full synthetic (5W-20).

The car is a 2013 Hyundai Sonata and I haven't had any trouble with it. It has 18,500 miles on it.

They said they will flush the engine and replace with full synthetic, but I don't know if any additional damage was done from not using the proper motor oil. Should i take it to a mechanic to get it checked out? I dont want to end up with a huge problem because of this.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Oct 18, 2013, 1:49 PM

Post #2 of 6 (863 views)
Re: Auto Repair Shop's Been Using the Wrong Motor Oil Sign In

I don't know where you got that info from.
Here is the factory requirement


Engine Oil
2.0 turbo
Type API Service SM, ILSAC GF-4, ACEA A5 or above.
Viscosity 5W-30, 5W-40

2.4 engine
Grade API Service SM, ILSAC GF-4 or above.
Viscosity
All temperature range 5W-20, 5W-30
Above 0°F (-18°C) 10W-30



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



cbrown6305
New User

Oct 18, 2013, 2:30 PM

Post #3 of 6 (847 views)
Re: Auto Repair Shop's Been Using the Wrong Motor Oil Sign In

Do you mind if I ask what the source of this information is? The oil cap displays "SAE 5W-20" and several other internet sources have listed 5W-20. I would be happy to hear that I could use either. Smile


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Oct 18, 2013, 2:39 PM

Post #4 of 6 (842 views)
Re: Auto Repair Shop's Been Using the Wrong Motor Oil Sign In

That came from Alldata which is factory service manual info.

Here are the API designations



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



cbrown6305
New User

Oct 18, 2013, 3:27 PM

Post #5 of 6 (826 views)
Re: Auto Repair Shop's Been Using the Wrong Motor Oil Sign In

Cool, thanks!

Also, I don't know if there is a distinction between synthetic and non-synthetic for 5W-30. I'm assuming either is fine. Is this correct?


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Oct 18, 2013, 3:30 PM

Post #6 of 6 (824 views)
Re: Auto Repair Shop's Been Using the Wrong Motor Oil Sign In

Of course synthetic is better but worth the cost?, not necessarily. You can leave it in a little longer.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.







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