10 Best Conventional Motor Oil of December 2025

• Superior protection against engine sludge* *As measured in the Sequence VG Sludge test
• Advanced protection against viscosity and thermal breakdown
• Premium quality base oils and anti-wear additives to help extend the life of your engine
• Helps minimize oil consumption
• API SN/SM/SL/SJ; ILSAC GF-5/GF-4/GF-3

Castrol

• Exceeds industry standards for engine protection
• Extra wear protection helps keep engines running like new
• High quality additives resist oil breakdown in auto engines
• Motor oil flows easily at low temperatures

Valvoline

• 20w50 motor oil
• Provide better protection against volatility burn off.
• Formulated with superior base oils & patented additive technology
• For best performance, follow the manufacturer's recommendations in your vehicle owner’s manual.

Castrol

• Exceeds industry standards for engine protection
• Extra wear protection helps keep engines running like new
• High quality additives resist oil breakdown in auto engines
• Motor oil flows easily at low temperatures

Valvoline

• For best performance, follow the manufacturer's recommendations in your vehicle owner’s manual.
• Protection for extremely high temperatures
• Protection against harmful deposits and acids, which aids in a clean running and lasting engine
• May be used at any time in an engines life-cycle and is fully compatible with conventional engine oils
• Conventional motor oil is formulated for improved fuel economy
• Provides engine protection and performance required by modern engines

Formula Shell

• Synthetic blend High Mileage 5W-20 engine oil specially formulated for new or late model SUVs, light vans and trucks, and passenger cars
• Recommended for vehicles with over 75,000 miles
• Helps prevent sludge and other damaging deposits
• Contains seal conditioning agents for dry or cracked engine seals to help reduce leaks and oil consumption
• Provides proven wear protection for engine parts
• Single 5-quart bottle with ergonomic design for easy handling and pouring
• Exceeds the requirements of the following industry specifications: API SP and all previous categories

Pennzoil

• Conventional 10W-30 engine oil formula that keeps engines clean and responsive
• No leading conventional oil provides better wear protection (Based on Sequence IVA wear test using SAE 5W-30).
• Helps prevent sludge and other damaging deposits (Based on Seq VH Sludge Test)
• Compatible with engine seals and all conventional oils
• Single 5-quart bottle with ergonomic design for easy handling and pouring
• Exceeds the toughest industry standards (Based on ILSAC GF-6 and API SP)
• Formulated for modern turbocharged engines—GF-6, API SP/SP-Resource Conserving and all previous categories

Pennzoil

• Unique TriShield technology provides superior deposit protection
• Maximum protection against viscosity and thermal breakdown
• Ultra low friction to improve gas mileage; Bottle Color: White
• Meets Chrysler MS 6395, Ford WSS-M2C929-A, Ford WSS-M2C930-A, GM 6094M
• Exceeds ILSAC GF-5, API SN

Castrol

• For best performance, follow the manufacturer's recommendations in your vehicle owner’s manual.
• Helps prevent build up that can cause rust and corrosion
• Reduces friction for less engine wear
• High resistance to viscosity and thermal breakdown
• Helps reduce exhaust emissions

Amazon Basics

• Synthetic blend 5W-30 engine oil that provides durable wear protection and reduces engine wear
• Provides corrosion protection against harmful acids generated by engine contaminants
• Maintains viscosity from start to finish, providing optimal oil film protection
• Helps engines survive daily commutes from high-speed highway operation to repetitive, stop-and-go driving
• Combats engine sludge and deposits
• Formulated to exceed industry specifications: ILSAC GF-6A, API SP/SP-Resource Conserving and all previous categories
• Single 5-quart bottle with ergonomic design for easy handling and pouring
• Meets OEM requirements: Chrysler MS-6395, Ford WSS M2C946-A, Ford WSS M2C946-B1, GM 6094M
• Formerly known as Quaker State Advanced Durability 5W-30 motor oil

Quaker State