1985 GMC K2500 Oil Capacity, Types, & Filters
Your ultimate DIY maintenance guide for the 1985 GMC K2500 oil change is here! No more searching – find all the critical oil specs for your 1985 GMC K2500, including exact engine oil capacity, the manufacturer recommended oil viscosity and type, and the correct OEM and aftermarket oil filters.
We cover all available engine options categorized by their specific engine codes, ensuring you get pinpoint accuracy for your specific vehicle configuration. Keep reading to discover everything required for a successful 1985 GMC K2500 oil change!
Scroll Table ➜
| Engine & Code | Oil Capacity | Oil Viscosity/Type | Oil Filter |
|---|---|---|---|
| 5.7L 8-cylinder [L] L | 5 quarts (with filter) | SAE 10W-30 (Above -18°C) SAE 15W-40 (Above -12°C) | GM 19431429 GM 25010908 GM 12731179 |
Select Your 1985 GMC K2500 Engine Option
5.7L 8-cylinder Engine Code [L] L
Engine:
5.7L 8-cylinder [L] L [aka 5.7L V8 (Gas)]
Body & Trims:
Base, High Sierra, Sierra Classic
Oil Capacity:
5 quarts (with filter)
Oil Viscosity/Type:
SAE 10W-30 (Above -18°C)
SAE 15W-40 (Above -12°C)
OEM Oil Filter:
Oil Filter Replaces:
25014831, 25160561, 6438384, 89060468 and 12576499, 19210285, 19256044, 25010324, 25014377, 6437462, 89017342
1985 GMC K2500 5.7L 8-cylinder [L] L oil change details
Oil Grade:
API*
Oil Capacity:
5 quarts. (with filter). This is the capacity with the oil filter installed. Always check the oil level after refilling.
Oil Viscosity/Type:
SAE 10W-30 (Above -18°C) - SAE 10W-30 is preferred.
SAE 15W-40 (Above -12°C)
Oil Drain Plug Torque:
20 ft/lbs (Oil Drain Plug)
Notes:
N/A
People also ask – 1985 GMC K2500
What is the oil capacity of a 1985 GMC K2500?
Depending on the specific engine option, the 1985 GMC K2500 oil capacity ranges from 5 to 5 quarts. Here is the exact oil capacity breakdown for each available engine configuration:
• 5.7L 8-cylinder ([L] L): 5 quarts. (with filter). This is the capacity with the oil filter installed. Always check the oil level after refilling.
Always check your dipstick after refilling to ensure the proper level.
What type of oil does a 1985 GMC K2500 use?
Across its 1 available engine configurations, the 1985 GMC K2500 uses the following motor oil viscosities: SAE 10W-30 (Above -18°C)SAE 15W-40 (Above -12°C). Using the correct manufacturer-approved oil weight is crucial for engine health. Here are the specific oil type requirements by engine:
• 5.7L 8-cylinder ([L] L):Grade: API*
SAE 10W-30 (Above -18°C) - SAE 10W-30 is preferred.
SAE 15W-40 (Above -12°C)
What is the best oil filter for the 1985 GMC K2500?
The proper oil filter depends on your exact engine code. The 1985 GMC K2500 utilizes the following premium aftermarket Wix oil filters across its lineup: 51061-EA. Here is the specific OEM and aftermarket filter data for each engine:
• 5.7L 8-cylinder ([L] L):OEM Filter: GM 19431429, GM 25010908 or GM 12731179
Wix Filter: 51061-EA
How often should I change the oil in my 1985 GMC K2500?
For modern models running full synthetic oil, oil change intervals are typically every 7,500 to 10,000 miles. However, for older GMC K2500 generations (1985-2010) or those using conventional/synthetic-blend fluid, changing the oil and filter every 3,000 to 5,000 miles is highly recommended to prevent sludge buildup. Regardless of engine (5.7L 8-cylinder), you should change your oil at least once a year even if you don’t reach the mileage limit.