1990 GMC R3500 Gear Oils

Castrol® GTX® High Mileage 10W-30 Synthetic Blend Motor Oil is the ultimate choice for extending the life of high-mileage engines. Designed with advanced Phosphorus Replacement Technology, it safeguards your vehicle’s emission system while meeting or exceeding API SP and ILSAC GF-6 standards. This premium synthetic blend offers superior dispersancy to combat sludge buildup, exceptional oil burn-off protection that surpasses industry benchmarks, and advanced additives to minimize engine wear. Its seal conditioners help reduce leaks, ensuring optimal engine performance over time. Engineered for improved fuel economy in 10W-30 grades, this motor oil is perfect for drivers seeking reliability and efficiency. With a 5-quart capacity, it delivers outstanding value and peace of mind for your high-mileage vehicle.

Product Features:

• 
  
  

Product Features:

• Phosphorus Replacement Technology helps extend emission system life
• Superior dispersancy that fights sludge build up
• Exceptional oil burn-off protection exceeding industry standards (1)
• Seal conditioners to help reduce leaks
• Advanced additives that minimize engine wear
• Improved fuel economy (2)
• (1) Based on API and ACEA volatility specifications
• (2) In 5W-20, 5W-30 and 10W-30 grades versus industry specifications
• Meets or exceeds the following specifications:
• API SP/SN PLUS/SN/SM
• ILSAC GF-6

Pennzoil Platinum Full Synthetic 5W-30 is designed to maximize engine protection and is backed by a 15,000-mile protection guarantee (see Warranty Information below) to protect your pursuit of every mile. Made with natural gas, it is formulated for complete protection for top engine performance. Pennzoil Platinum offers cleaner pistons (based on Sequence IIIH results), helps protect engines from loss of power, delivers better fuel economy (based on the latest industry standard), provides unsurpassed wear protection (based on Sequence IVA wear test using SAE 5W-30), and provides excellent performance in extreme temperatures. (Pennzoil Platinum Lubrication Limited Warranty: Protection for up to 15,000 miles or one year, whichever comes first. Use an oil filter designed for longer oil change intervals and follow OEM manual and vehicles oil life sensor to maintain OEM warranty. Excludes severe driving conditions, including racing and commercial use. Your engine must have fewer than 125,000 miles and have been manufactured in the past 72 months. Enrollment required. Other conditions apply. See pennzoil.com/warranty to enroll and for full details and terms.)

Product Features:

• Full synthetic 5W-30 motor oil that is made with natural gas and designed to maximize engine protection
• Backed by a 15,000-mile protection guarantee to protect your pursuit of every mile
• Provides better fuel economy (based on the latest industry standards)
• Keeps pistons cleaner than required by the toughest industry standard (based on Sequence IIIH results)
• Designed for high-performance engines
• Formulated to provide faster low-temperature oil flow and protection in extreme heat
• Helps protect engines from loss of power
• Meets or exceeds the requirements of the following industry specifications: API SP, API SP-Resource Conserving, and all previous categories; ILSAC GF-6A
• Meets or exceeds the following OEM requirements: Chrysler MS-6395, MS-13340; GM dexos1 Gen. 3; Ford WSS-M2C961-A1
• For a full list of equipment approvals and recommendations, please consult your local Shell Technical Help Desk and always consult your owner’s manual

Castrol® GTX® 10W-30 is a premium conventional motor oil that has been helping to extend engine life for over 50 years. It is specially engineered to prevent harmful build-up of sludge while protecting against new oil splatter formation better than tough industry standards. Sludge is a thick, tar like substance caused by severe driving conditions such as heavy traffic, poor fuel quality, harsh driving conditions and exceeding oil change intervals. Sludge can block your engine’s vital oilways like cholesterol and if untreated, can rob an engine of its power and ultimately its life.

Product Features:

• Advanced protection against viscosity and thermal breakdown
• Superior protection against engine sludge
• Premium quality base oils and anti-wear additives to help extend the life of your engine
• Helps minimize oil consumption
• Meets or exceeds the following specifications:
• API SP/SN PLUS/SN/SM
• ILSAC GF-6

Castrol® GTX® 10W-30 is a premium conventional motor oil that has been helping to extend engine life for over 50 years. It is specially engineered to prevent harmful build-up of sludge while protecting against new oil splatter formation better than tough industry standards. Sludge is a thick, tar like substance caused by severe driving conditions such as heavy traffic, poor fuel quality, harsh driving conditions and exceeding oil change intervals. Sludge can block your engine’s vital oilways like cholesterol and if untreated, can rob an engine of its power and ultimately its life.

Product Features:

• Advanced protection against viscosity and thermal breakdown
• Superior protection against engine sludge
• Premium quality base oils and anti-wear additives to help extend the life of your engine
• Helps minimize oil consumption
• Meets or exceeds the following specifications:
• API SP/SN PLUS/SN/SM
• ILSAC GF-6

3 Qt. Penzoil 80W90 conventional gear Oil. W/ bottle of Posi additive.

Product Features:

• Includes three quarts of conventional oil and one 4oz bottle of Yukon positraction additive

3 Qt. Penzoil 80W90 conventional gear Oil.

Product Features:

• Includes three quarts of conventional oil

Help keep positraction chatter down with posi additive from Yukon Gear & Axle.

Product Features:

• positraction additive
• For use in any clutch-style limited slip