What Oil Should I Use for My L5P Duramax?

Maintenance and Repairs
1

Seeking Advice on Oil Type for L5P Duramax

Hey everyone,

I’m looking for some guidance on the right oil type for my L5P Duramax engine. I want to make sure I’m using the best product to keep my truck running smoothly and efficiently. I know that maintaining a diesel engine is crucial for longevity and performance, but with so many options out there, it’s hard to know which oil will provide optimal protection and performance.

Here’s a bit about my situation:

  • I own a 2020 Chevrolet Silverado with the L5P Duramax engine.
  • I’m considering doing the oil change myself, so I need to know the oil specs to look for.
  • I’ve read that using the correct oil can really impact engine performance and lifespan.

Questions:

  1. What is the recommended oil type for the L5P Duramax?
  2. Are there specific brands that are highly recommended?
  3. Is there a difference between synthetic and conventional oils for this engine?
  4. Any tips on performing the oil change myself?

I’d appreciate any insights or experiences you can share! Thanks in advance for your help!

Best,
qblanchard

2

I’m a fan of full synthetic oil for my L5P Duramax. It provides better protection, especially in extreme temperatures. I use 5W-40 for both hot summers and cold winters.

3

I agree with you, Courtney! Synthetic oils generally perform better and keep the engine cleaner compared to conventional oils. Just make sure it meets GM’s dexos2 specification!

4

Jumping in here: I’ve been using 15W-40 conventional oil. It’s less expensive, and I haven’t had any issues yet. But I’m curious about trying synthetic next change.

5

Considering how much newer engines are designed, you might want to reconsider and give synthetic a shot! It could improve overall performance.

7 Likes
6

I switched to synthetic too, and I noticed smoother starts, especially in winter! I highly recommend it!

7

Same here! I feel the difference in my engine too! But interestingly, I heard some folks arguing that conventional might give better wear protection under certain conditions.

8

It’s hard to choose! Viscosity ratings can be confusing too. Some say 5W-30 is good for fuel economy, but others argue 5W-40 gives better protection.

3 Likes
9

Exactly! A lot depends on your specific driving conditions. Heavy towing might lean you towards a higher viscosity like 5W-40.

10

I follow the manufacturer recommendations, which suggest 15W-40 for the L5P. I think it’s solid advice for maintaining warranties.

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That’s a wise approach! You can never go wrong by sticking to what the manual says for your vehicle.

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12

I’d love to see some manufacturer-specific oil comparisons. It could aid in making informed choices for our Duramax engines!

13

That’s a fantastic idea, Mitchell! I’m always hunting for more data on oil performance to help refine my choices.

14

I used to be pro-conventional until I tried synthetic and never looked back! My L5P feels like a new truck!

5 Likes
15

Haha, I love that! It’s amazing how the right oil can literally change your driving experience. Cheers to that!

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16

For the L5P Duramax, I typically recommend using a full synthetic oil like 5W-40. It offers great performance, especially in extreme conditions. I’ve noticed better fuel efficiency with it too!

17

I’ve used 15W-40 conventional oil in mine and noticed it runs smoother in the summer. However, I worry about it in the winter. Anyone else have this concern?

18

I stick to 5W-40 full synthetic too, especially for the cold months. It helps prevent wear and tear. Plus, my fuel efficiency has improved significantly compared to what it was with conventional oil.

19

What brand of synthetic oil are you all using? I’ve heard good things about Mobil 1 and Amsoil.

20

I prefer Rotella T6. It’s worked wonders for my Duramax, and I’ve had zero issues with it. It’s often recommended by diesel enthusiasts.