WHAT KIND of motor oil for a 08' hynduiya elantra

Trunk, right rear quarter

https://ellagracebranch.blogspot.com/2020/08/hyundai-elantra-amplifier-location.html

https://www.google.com/search?q=2010+hyundai+elantra+factory+amp+location

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The symptom is what? Low oil pressure?

Go to www.hmaservice.com and register your vehicle by VIN #..
you'll then have access to wiring diagrams, shop manuals,
service bulletins, illustrations, etc.

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Check hot in neutral while engine is running.

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- Spark Plugs (make sure they are gaped properly)
- Spark Plug Wires
- Coil Packs (if needed) or Distributor Cap & Rotor (which ever so equipped)
- Air Filter
- Fuel Filter
- Oil
- Oil Filter
- Transmission Filter (optional)
- Transmission Fluid (optional if you do change the trans filter you will need the fluid)
- PCV Valve (optional)
- Bottle Of Fuel Injector Cleaner (add to fuel tank kind)

10w-30 you can use high mileage..assuming you live in an area with normal tempratures.

CHECK CABLE WIRING FOR BAD CONNETIONS IN THE ENGINE BAY

You do not need to change the oil for the seasons,as the oil is "multigrade" (that means it gets thicker as it gets hotter.)BUT when new, you should use 5/30 and as the car gets older,or uses/burns oil it is my opinion,that it should get a higher (lower sae #)grade of oil to compensate so 5/30 will go to 10/40 if and when you start to use the "thicker" oil is dependant on your cars usage/burn rate.

Transaxle gear oil : HYUNDAI GENUINE PARTS MTF 75W/90 (API GL-4)

If it has a 1.8l engine it should be 4.5 quarts.