The 1998 GMC Sierra with the 5.7-liter V8 typically requires about 5 quarts of engine oil for a standard change with a new filter; if you drain without replacing the filter, the capacity is around 4.5 quarts. Always verify the level with the dipstick after adding oil and use the recommended viscosity for your climate, commonly 5W-30.
Engine context and why capacity matters
Understanding the oil capacity helps ensure proper lubrication, optimal engine performance, and accurate dipstick readings during maintenance. The 5.7L V8 used in the 1998 Sierra is a relatively simple, widely serviced GM engine, and its oil-fill figures are commonly cited in service data for routine changes.
Oil capacity specifications
The following figures are the two standard fill amounts cited for this engine, depending on whether the oil filter is counted in the total:
- With the oil filter in place: 5 quarts
- Without the oil filter: 4.5 quarts
When performing a full change, plan to start with the higher figure (5 quarts) and then top off as needed after checking the level on the dipstick once the engine has run and settled.
Oil viscosity and maintenance tips
For most climates, the recommended oil viscosity is 5W-30. In extremely hot conditions or depending on specific driving patterns, some technicians may opt for a different grade per the owner's manual or a GM service bulletin. Always replace the oil filter during a change and recheck the level after a brief idle/run test.
Summary
For a 1998 GMC Sierra with a 5.7L V8, you should plan on about 5 quarts of oil when doing a full change with a new filter, or roughly 4.5 quarts if the filter isn’t being replaced. Use 5W-30 in most conditions and confirm the final level with the dipstick after starting the engine and letting it settle.
What kind of oil does a 1998 5.7 take?
Oil Grade: API*
5W-30 (All TEMPS) - SAE 5W-30 is preferred.
What kind of oil does a 1998 GMC Sierra take?
SAE 5W-30
Engine Oil
5W-30 (All TEMPS) - SAE 5W-30 is preferred.
How many quarts of oil does a 5.7 L Vortec hold?
5 quarts Initial Fill.
Can I put 5W-30 in my GMC Sierra?
The GMC Sierra 1500 oil type depends on the kind of engine you have. For a gasoline engine, we recommend SAE 5W-30 Dexos1 full synthetic oil. If you want protection for really low temperatures, consider 0W-30 oil. If you've got a Duramax turbo diesel engine, use SAE 0W-20 DexosD diesel engine oil.