We just purchased a new 2023 Suburban with the 3.0 Duramax, our first diesel. GM calls for 0W-20 Dexos D certified oil, which sadly, is in short supply. I'd like to find an alternative oil that I can be confident in and that's readily available. I've tried cross-referencing certifications that are on Dexos D oils (such as ACEA C5) with other oils that have those certifications, but even that seems to get tough to track; some Dexos D oils carry the C5 certification, while others carry the C6. My ignorance to diesels and particulate filters means I can't confidently infer the right alternatives. Maybe I'm overthinking this! My questions:
1. What's a good diesel/particulate filter friendly oil? If the C5 and C6 criteria applies, then I'm looking for low SAPS.
2. Is 0W-20 the right weight? Or do I go heavier or at least an oil that is heavier on the 0W-20 range? I cringe at milage "efficient" oils. I'm in always-hot Texas.
3. Can I somewhat confidently follow a more readily available certification (e.g. C5? Porsche? Dexos 1?)?
The Suburban is used for lots of in-town miles, hauling the family. If we will ever tow, it will be a small trailer.
Thanks!
1. What's a good diesel/particulate filter friendly oil? If the C5 and C6 criteria applies, then I'm looking for low SAPS.
2. Is 0W-20 the right weight? Or do I go heavier or at least an oil that is heavier on the 0W-20 range? I cringe at milage "efficient" oils. I'm in always-hot Texas.
3. Can I somewhat confidently follow a more readily available certification (e.g. C5? Porsche? Dexos 1?)?
The Suburban is used for lots of in-town miles, hauling the family. If we will ever tow, it will be a small trailer.
Thanks!