Below you will find the best synthetic oil for a 1985 Gmc Trucks C2500. Maximize your vehicle's potential with 100% full synthetic oil that is made in the USA! For more than the past 50 years, AMSOIL has perfected the art of maximizing efficiency and engine life. The advanced synthetic formulas deliver superior protection from heat, friction, and wear, keeping engines as good as new for miles. Upgrade to AMSOIL today and experience better performance, reliability, and reduced oil consumption. Click add to cart for more details. Sign up as a preferred customer and get discounts and more! The oil type, capacity and oil filter (if available) are listed below and verified for accuracy. Upgrade now!
Recommended oil for my 1985 C2500
| Product Name | Product Description | Capacities | Product |
|---|---|---|---|
| Signature Series Max-Duty Synthetic Diesel Oil 10W-30 | Protect your 1985 Gmc Trucks C2500 with the best synthetic diesel oil. You will get six times better protection than required by the Detroit Diesel DD13 Scuffing Test. Advanced formula which protects under severe temperature and prevents oil burning/consumption. Max protection and made in the USA. | With filter 7 quarts After refill check oil level. |
DTT1G-EA
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| Heavy-Duty Synthetic Diesel Oil 10W-30 | AMSOIL Heavy-Duty Synthetic Diesel Oil is made for hard-working equipment. It is engineered to provide 4X better wear protection than required by the Detroit Diesel DD13 Scuffing Test for Specification DFS 93K222.R efer to the owner's manual for your 1985 Gmc Trucks C2500 for the specific oil change interval. Get the best synthetic diesel oil change ever for your 1985 Gmc Trucks C2500 6.2L engine! | With filter 7 quarts After refill check oil level. |
ADNQT-EA
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| Signature Series Max-Duty Synthetic Diesel Oil 5W-30 | You have found Our top-grade synthetic diesel oil for your 1985 Gmc Trucks C2500! Protect your investment in diesel power and confidently extend drain intervals! Provides six times better wear protection than required by the Detroit Diesel DD13 Scuffing Test for Specification DFS 93K222. Heavy-Duty On-/Off-Road: Three times (3X) OEM1 recommendation, not to exceed 60,000 miles/600 hours or oneyear, whichever comes first. Turbodiesel Pickup: Two times (2X) OEM1 recommendation, not to exceed 25,000 miles or one year, whichever comes first. Gasoline Engine | With filter 7 quarts After refill check oil level. |
DHDQT-EA
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Recommended oil filters for my 1985 C2500
| Product Name | Product Description | Product |
|---|---|---|
| AMSOIL Ea Oil Filters | This filter is for your 1985 Gmc Trucks C2500 and is designed to last up to 25k (normal conditions) or 15k miles (severe conditions) or 1 year, whichever comes first. |
EAO24-EA
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Recommended coolants for my Gmc Trucks C2500
| Product Name | Product Description | Capacities | Product |
|---|---|---|---|
| Passenger Car & Light Truck Antifreeze & Coolant | maximum protection for your 1985 Gmc Trucks C2500 under extreme temperatures and operating conditions! Lasts up to 150,000 miles or five years! (whichever comes first) |
ANTPC1G-EA
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| Low Toxicity Antifreeze and Engine Coolant | Lasts in your 1985 Gmc Trucks C2500 for up to 150,000 miles or five years! (whichever comes first). Biodegradable! |
ANT1G-EA
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Amsoil provides the maximum protection against wear, improves your car or truck's fuel economy and performance under high temperatures. Great for winter and cold starts. Amsoil is the only synthetic oil that has an interval up to 25,000 miles and is made domestically. Save yourself time, money and protect your car, truck, boat, or motorcycle with the many Amsoil products available. We also have oil for your snowmobile, UTV, ATV, jet ski or personal watercraft, and rig or semi-truck.


