1978 Cadillac Seville Engine Oils

Shell Rotella T5 10W-30 Synthetic Blend diesel engine oil with Triple Protection Plus technology combines synthetic base oils and advanced additive technology to provide protection against wear, deposits, and oil breakdown. Triple Protection Plus technology also provides better low-temperature flow and better fuel economy performance (up to 2% fuel economy savings compared to conventional 15W-40 motor oil). The advanced low-ash formulation helps control the blocking or poisoning of exhaust after-treatment devices, helping maintain vehicle emission compliance and engine fuel efficiency. Meeting the requirements of major US and European engine manufacturers for low-emission, heavy-duty engine applications, it’s an excellent choice for on-highway fleets, construction and agriculture applications, and diesel pick-up trucks. Shell Rotella T5 is backed by a free warranty valid up to 10 years or 300,000 miles, whichever comes first. (Shell Rotella Limited Warranty: Valid up to 10 years or 300,000 miles, whichever comes first, if you exclusively use Shell Rotella T5 Synthetic Blend heavy-duty engine oil. Terms and conditions apply. See Rotella.Shell.com/warranty for details.) Volume: 5 gallons.

Pennzoil Platinum High Mileage Full Synthetic 10W-30 is designed to maximize engine protection and is formulated to help stop leaks in engines with more than 75,000 miles. Backed by a 15,000-mile protection guarantee to keep you covered between oil changes and for the long run (see Warranty Information below), it is the first of its kind full synthetic high mileage motor oil made with natural gas and designed to deliver less oil burn off than other high mileage oils (based on Sequence IIIH results). Pennzoil Platinum High Mileage motor oil conditions seals on older engines to give added protection to high-mileage vehicles. It offers complete protection mile after thrilling mile as it protects engines from loss of horsepower, offers excellent performance in extreme temperatures, provides unsurpassed wear protection (based on Sequence IVA wear test using SAE 5W-30), and provides better fuel economy (based on the latest industry standards). (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.) Volume: 5 quarts.

T4 Triple Protection 10W-30 Diesel Engine Oil delivers advanced performance and reliability for diesel engines, combining cutting-edge technology with the trusted durability of Shell Rotella. This conventional oil is engineered to provide enhanced protection against oxidation, wear, and deposits, ensuring your engine stays cleaner and performs better over time. Its improved formula supports sustained emission control system durability, making it ideal for vehicles equipped with particulate filters and after-treatment systems. Designed for hard-working diesel engines, this 10W-30 oil adapts to demanding driving conditions, offering consistent performance and long-lasting protection. With a 1-gallon capacity, it’s a dependable choice for maintaining engine health and efficiency. Volume: 1 gallon.

T4 Triple Protection 10W-30 Synthetic Blend Diesel Engine Oil delivers advanced performance for diesel engines, combining cutting-edge technology with proven reliability. This synthetic blend is engineered to provide enhanced protection against oxidation and wear, ensuring your engine stays robust under demanding conditions. Its improved deposit control promotes cleanliness, helping to maintain optimal engine performance over time. Designed specifically for diesel engines, this oil sustains emission control system durability, making it ideal for vehicles equipped with particulate filters and after-treatment systems. With its SAE 10W-30 weight, it adapts seamlessly to varying driving conditions, offering consistent protection and efficiency. Whether you’re tackling tough jobs or long hauls, this oil is built to keep your engine running smoothly while maximizing its lifespan. Volume: 1 quart.

Shell Rotella T6 10W-30 diesel engine oil is a full synthetic motor oil that features exclusive Triple Protection Plus technology. It’s formulated with fully synthetic base oils plus advanced additives to protect against wear, deposits, and oil breakdown. It also provides lower oil consumption for reduced maintenance costs, improved wear performance versus API CJ-4 technology, extended drain capabilities for more uptime, improved protection against oxidation for increased fuel economy, and a low ash formulation for emissions system compatibility. Suitable for virtually all modern low-emission heavy-duty engines and older hard-working diesel engines, Shell Rotella T6 10W-30 is an excellent choice for on-highway fleets, general haul, construction, agriculture, public-transport operators, and diesel pick-up trucks. Volume: 5 gallons.