Gasoline Engine Oil SL 15W-40 / 20W-50 Supplier | High Viscosity Motor Oil Manufacturer

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High Viscosity Gasoline Engine Oil SL 15W-40 / 20W-50

Product Description

Our Gasoline Engine Oil SL 15W-40 / 20W-50 is specially formulated with high-quality base oils and advanced additives to provide superior protection for high-load and high-temperature operating conditions. This high-viscosity motor oil is ideal for older engines and vehicles with high mileage, ensuring stable lubrication, reduced oil consumption, and extended engine life.

• Packaging: 1L，4L，5L，200L

• Customized packaging available upon request.

High Viscosity Gasoline Engine Oil SL 15W-40 / 20W-50

Specifications and Approvals

• API SL

Performance Benefits

• Excellent High-Temperature Stability

Formulated to maintain stable viscosity under extreme heat, this high viscosity engine oil ensures reliable lubrication in hot climates and heavy-duty operating conditions, preventing oil breakdown and engine damage.
• Enhanced Wear Protection

Advanced anti-wear additives reduce friction and metal-to-metal contact, providing strong protection for engines under heavy load, making it ideal for high mileage and older gasoline engines.
• Improved Oil Consumption Control

The thicker oil film helps reduce oil consumption and leakage, especially in worn engine components, improving overall engine efficiency and longevity.
• Strong Deposit Control

Effectively prevents sludge and carbon buildup, keeping engine parts clean and ensuring stable performance over extended operating periods.

Applications

Applications of Gasoline Engine Oil SL 15W-40 / 20W-50

Passenger cars with high mileage
Vehicles operating in hot climates
Light-duty commercial vehicles
Engines under heavy load conditions
Older gasoline engines requiring API SL

15W-40 vs 20W-50 Engine Oil – Which One Should You Choose?

15W-40 engine oil offers better cold-start performance and is suitable for moderate climates, while 20W-50 provides thicker oil film and stronger protection in high-temperature and high-load conditions.

For engines with high mileage or operating in hot environments, 20W-50 is often the preferred choice.

Frequently Asked Questions (FAQ)

What is 20W-50 engine oil used for?

20W-50 engine oil is commonly used in high-temperature environments and older engines with higher mileage.

Is 15W-40 good for gasoline engines?

Yes, 15W-40 can be used in gasoline engines that require API SL specification, especially under moderate to heavy operating conditions.

Which is better, 15W-40 or 20W-50?

20W-50 offers better protection in hot climates, while 15W-40 performs better during cold starts.

Can I use 20W-50 instead of 10W-40?

It depends on the engine requirements. Thicker oil may reduce flow in cold conditions, so always follow manufacturer recommendations.

Is high viscosity oil better for old engines?

Yes, high viscosity oil helps reduce leakage and improves sealing in worn engine components.

Why Choose YUANGEN as Your Engine Oil Supplier?

30+ years lubricant manufacturing experience
OEM & private label engine oil support
Bulk supply (1L / 4L / 18L / 200L)
Strict quality control system
Exported to 90+ countries

👉 Get a free quote within 12 hours

Related Products

Get detailed product specifications and have our technical experts confirm whether this formulation is suitable for your equipment.

ACCESS PRODUCT DATA

Typical Test Data

YUANGEN X6 PRIME SL 15W-40

Test Item	Result	Method
Density (20℃), g/cm³	0.869	ASTM D4052
Kinematic Viscosity (100℃), mm²/s	15.1	ASTM D445
Kinematic Viscosity (40℃), mm²/s	117.8	ASTM D445
Viscosity Index	133	ASTM D2270
Pour Point, ℃	-36	ASTM D97
Flash Point (COC), ℃	232	ASTM D92
Viscosity, Crank (-20℃), mPa	5800	ASTM D5293

YUANGEN X6 PRIME SL 20W-50

Test Item	Result	Method
Density (20℃), g/cm³	0.877	ASTM D4052
Kinematic Viscosity (100℃), mm²/s	18.8	ASTM D445
Kinematic Viscosity (40℃), mm²/s	167.5	ASTM D445
Viscosity Index	127	ASTM D2270
Pour Point, ℃	-32	ASTM D97
Flash Point (COC), ℃	240	ASTM D92
Viscosity, Crank (-15℃), mPa	7100	ASTM D5293

Health, Safety & Environment

The product is unlikely to present any significant health or safety hazard when properly used in the recommended application, and good standards of personal hygiene are maintained.
Avoid contact with skin. Use impervious gloves with used oil. After skin contact, wash immediately with soap and wate
Take used oil to an authorised collection point. Do not discharge into drains, soil or water.

Storage

All packages should be stored under cover. Where outside storage is unavoidable, drums should be laid horizontally to avoid the possible ingress of water and damage to drum markings. Products should not be stored above 60°C, exposed to direct sunlight or freezing conditions.

The indicated properties are typical of those obtained with normal production tolerance and do not constitute a specification. All the information contained in this document is considered accurate as of date of printing, and no warranty or representation, expressed or implied is made as to the accuracy of the data and information in this publication. The information contained herein is subject to change without notice.

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For data security, YUANGEN does not disclose detailed product information on this website. Please briefly describe your equipment and application, and our technical team will review your request, provide accurate product specifications, and offer guidance on equipment compatibility.

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