The typical answer is 5W-30 engine oil (conventional or synthetic) for most 2008 Yukons, with a total oil capacity around 6 quarts for the 5.3L V8. Denali models equipped with the 6.2L V8 require more oil, about 8 quarts. Always confirm the exact specification in your owner's manual or on the oil fill cap.
Engine oil types and capacities
5.3L V8 (non-Denali)
The following guidance applies to the common 5.3L V8 in the 2008 Yukon.
- Viscosity: 5W-30 is the recommended grade for most climates. In extremely cold conditions, some owners opt for a lighter 0W-30 if advised by the manual.
- Oil type: Conventional oil is acceptable, and synthetic oil is also suitable if you prefer longer-drain protection.
- Oil specification: Use oil that meets API service SM (or higher) standards.
In short, the 5.3L Yukon typically runs best on 5W-30 oil (conventional or synthetic) that meets API SM or newer, with about 6 quarts of oil capacity when performing a full change.
6.2L V8 (Denali)
The Denali trim uses the larger 6.2L V8, which changes the oil requirements slightly.
- Oil capacity: About 8 quarts (roughly 7.5–8.0 liters) with a filter.
- Viscosity: 5W-30 is commonly recommended for the 6.2L, though you should verify climate-specific guidance in the manual.
- Oil specification: Use oil meeting API service SM or higher; Dexos compatibility is often noted for GM engines of this era, but the manual should be your final reference.
Always refer to the owner’s manual for the exact figure and any franchise-specific recommendations, and ensure the fill level is correct after the change.
Oil change intervals and practical tips
Beyond choosing the right oil, following proper change intervals helps protect the engine. Conventional oil is commonly changed every 3,000–5,000 miles, while synthetic oil can extend to roughly 5,000–7,500 miles, depending on driving conditions and GM recommendations. Heavy or frequent high-stress driving may shorten intervals.
When performing any oil change, use the correct oil capacity for your engine, replace the oil filter, and check the dipstick after filling to ensure the level is within the recommended range.
Summary
For a 2008 GMC Yukon, the standard recommendation is 5W-30 engine oil, usable in either conventional or synthetic form. The 5.3L V8 typically requires about 6 quarts of oil, while the 6.2L V8 in Denali models needs about 8 quarts. Always verify exact specifications in the owner’s manual and follow the recommended maintenance intervals based on your driving conditions.
What type of oil does a 2008 GMC Yukon take?
Oil Grade: SEO23
| Viscosity: | 5W-30 (All TEMPS) |
|---|---|
| Capacity: | 6 quarts (with filter). After refill check oil level. |
| Torque: | 18 ft/lbs (Oil Drain Plug) |
What kind of oil does a 5.3 L GMC Yukon take?
Oil Grade: SEOC3
| Viscosity: | 0W-20 (All TEMPS) |
|---|---|
| Capacity: | 8 quarts (with filter). After refill check oil level. |
| Torque: | 18 ft/lbs (Oil Drain Plug) Replace drain plug seal. |
| Notes: | (1) This specification has been updated from Dexos 1 Gen 2 to GM Dexos 1 Gen 3. |
How many quarts of oil does a 2008 GMC Yukon 5.3 take?
6 quarts
Engine Oil
Capacity: 6 quarts (with filter). After refill check oil level.
What oil does a 2008 GMC 5.3 take?
SAE 5W-30
Earlier Generation (2007–2013, “GMT900”) For most gasoline engines (4.3L/5.3L/6.0L/6.2L), the period guidance specifies SAE 5W-30 and the then-current GM approval (later years overlapped with the early dexos1 era).