1981 Buick Skylark Gear Oils

Mobil 1 motor oil utilizes our signature Triple Action Formula to deliver outstanding engine performance, protection, and cleanliness to vehicles of all ages. Specialty components in synthetic oil extend engine life by reducing the friction that causes deposits and sludge buildup – keeping critical engine parts clean and protected for up to 15,000 miles between oil changes.(1) Mobil 1 motor oil meets ILSAC GF-7 standards, offering superior oxidation control, enhanced protection against pre-ignition and timing chain wear, and excellent cold-start and low-temperature performance. Mobil 1 is the No. 1 selling motor oil in America at retail,(2) trusted and recommended by car builders and experienced mechanics, and is the Official Motor Oil of NASCAR(R). (1)Protects for 15,000 miles or 1 year, whichever comes first (2)Source: Circana/ Retail Tracking Service/ Dollar Sales/ 52 weeks ending February 1, 2025 Volume: 5 quarts.

Mobil 1 High Mileage motor oil utilizes our signature Triple Action Formula to deliver outstanding engine performance, protection, and cleanliness to vehicles of all ages. Specialty components in synthetic oil extend engine life by reducing the friction that causes deposits and sludge buildup – keeping critical engine parts clean and protected for up to 15,000 miles between oil changes.(1) Mobil 1 High Mileage motor oil meets ILSAC GF-7 standards, offering superior oxidation control, enhanced protection against pre-ignition and timing chain wear, and excellent cold-start and low-temperature performance. Mobil 1 is the No. 1 selling motor oil in America at retail,(2) trusted and recommended by car builders and experienced mechanics, and is the Official Motor Oil of NASCAR(R). Volume: 5 quarts.

Castrol EDGE 5W-20 is one of Castrol’s strongest oils and has been formulated to provide Superior Performance and Protection in 7 Critical Areas including fuel economy, high temperature performance, sludge control and wear protection for up to 20,000 miles between oil changes. Today’s engines are smaller, more powerful and under more pressure than ever before. Castrol EDGE has been engineered to withstand the intense friction of modern engines and provides 10X better high stress performance than the latest industry standard. Peak engine loads and extreme temperature can break down weaker lubricants, so viscosity control is the ultimate measure of strength for any motor oil. Castrol EDGE has been proven 3X stronger against viscosity breakdown than the leading full synthetic so its shear stable and maintains its initial viscosity to provide protection over an extended drain cycle of up to 20,000 miles between oil changes. Stronger for Longer. Volume: 5 quarts.

Castrol GTX 10W-30 provides superior sludge protection to help extend engine life. Severe driving conditions such as heavy traffic, poor fuel quality, harsh driving conditions and exceeding oil change intervals can all cause the build-up of a thick, tar like substance called sludge. Sludge can block your engine’s vital oilways like cholesterol and if untreated, can rob an engine of its power and ultimately its life. Castrol GTX is specially engineered to prevent harmful build-up of sludge while protecting against new oil splatter formation better than tough industry standards. Volume: 5 quarts.

Mobil 1 High Mileage motor oil utilizes our signature Triple Action Formula to deliver outstanding engine performance, protection, and cleanliness to vehicles of all ages. Specialty components in synthetic oil extend engine life by reducing the friction that causes deposits and sludge buildup – keeping critical engine parts clean and protected for up to 15,000 miles between oil changes.(1) Mobil 1 High Mileage motor oil meets ILSAC GF-7 standards, offering superior oxidation control, enhanced protection against pre-ignition and timing chain wear, and excellent cold-start and low-temperature performance. Mobil 1 is the No. 1 selling motor oil in America at retail,(2) trusted and recommended by car builders and experienced mechanics, and is the Official Motor Oil of NASCAR(R). Volume: 1 quart.

Castrol GTX High Mileage 10W-30 is specially formulated for vehicles with over 75,000 miles. It’s a synthetic blend engine oil formulated to provide Superior Protection in 7 Critical Areas including corrosion prevention, sludge control, timing and friction wear and unique protection for your emission system. As your vehicle ages, it becomes more prone to catalytic converter failure, one of the most common and costliest problems faced by higher mileage vehicles. All motor oil contains phosphorus to prevent engine wear, but phosphorus is known to be effectively poisonous to catalytic converters. Castrol GTX High Mileage 10W-30 is formulated with Phosphorous Replacement Technology, a proprietary additive that reduces the level of harmful phosphorus to protect the catalytic converter and preserve the life of your emission system. It also includes specialized additives to reduce leaks, oil burn off and power robbing deposits. Castrol GTX High Mileage 10W-30 provides maximum protection to help extend the life of your high mileage car. Volume: 1 quart.

Castrol EDGE High Mileage 10W-30 is the natural choice for drivers who demand maximum performance from their high mileage car. It’s been engineered to provide Superior Protection in 7 Crtitical Areas including corrosion prevention, sludge control, timing and friction wear and unique protection for your emission system. As your vehicle ages, it becomes more prone to catalytic converter failure. Castrol EDGE High Mileage is formulated with a with Phosphorous Replacement Technology, a proprietary additive that reduces the level of harmful phosphorus to protect the catalytic converter and preserve the life of your emission system. It’s full synthetic formula provides enhanced protection against extreme internal temperatures and also includes specialized additives to reduce leaks, oil burn off and power robbing deposits. Castrol EDGE High Mileage helps your car defy its miles and extend maximum performance. Volume: 1 quart.

TranSynd 668 Full Synthetic Transmission Fluid is engineered to deliver exceptional performance and durability for your vehicle’s transmission system. Designed with advanced features, it ensures improved gear protection and extended clutch-friction durability, making it ideal for both general-duty and severe-duty transmissions. With the ability to support extended drain intervals of up to 300,000 miles or 48 months in general-duty use and up to 150,000 miles or 48 months in severe-duty conditions, this fluid offers outstanding value and reduced maintenance downtime. Its excellent shear stability maintains consistent viscosity, providing reliable wear protection throughout the drain interval. Additionally, the fluid’s superior thermal and oxidation stability minimizes deposit formation, while its full-synthetic base ensures optimal performance across a wide temperature range. Enhanced corrosion and foaming resistance further contribute to the longevity and efficiency of your transmission system. Packaged in a convenient 1-gallon container, TranSynd 668 is the ultimate choice for those seeking high-performance, long-lasting transmission fluid. Volume: 1 gallon.