Comma Syner-G Full Synthetic 5W40 - 5 Liters ⚫ Review 🏆

Comma is a well-known British brand that specializes in automotive lubricants and additives. The company was founded in 1965 and has built a reputation for producing high-quality oils and fluids.

The Comma SYN5L Syner-G is one of Comma's flagship products, designed for modern gasoline and diesel engines. It is a fully synthetic 5W-40 motor oil, meaning it has a low viscosity rating for cold starts while still providing the high temperature protection of a 40-weight oil.

According to Comma, Syner-G is formulated using advanced additive technology to deliver exceptional engine protection, fuel economy benefits, and extended oil drain intervals. It is designed to meet the latest specifications from major manufacturers such as VW, Mercedes, BMW, and GM.

The 5W-40 viscosity grade makes Syner-G a versatile all-season oil suitable for both hot and cold climates. Let's take a deeper look at the specific benefits it offers for your engine.

Engine Protection

The Comma SYN5L Syner-G Full Synthetic 5W40 Motor Oil provides excellent engine protection for gasoline and diesel engines. It uses synthetic base oils and advanced additives to provide superior wear protection, cleanliness, and lubrication compared to conventional motor oils.

Key benefits for engine protection include:

• Reduces friction and wear on critical engine components like pistons, rings, bearings, and cylinder walls. The full synthetic formula provides a stronger oil film compared to lower quality oils.

• Keeps engines extremely clean by minimizing sludge and deposit formation. This is critical for long-term engine health and performance.

• Neutralizes acids and prevents corrosion. Combats the effects of fuel dilution in gasoline engines.

• Stabilizes oil viscosity and resists oil thickening under high temperatures. This ensures optimal oil flow to all parts of the engine in hot operating conditions.

• Has excellent shear stability to maintain viscosity. Will not thin out prematurely, providing continuous protection over extended oil drain intervals.

Overall, the Syner-G oil provides maximum engine protection under all operating conditions. It's a top-tier oil ideal for the latest gasoline and diesel engine designs.

In addition, the Comma XTech Fully Synthetic 5W30 - 5 Liters offers a premium solution for modern engines requiring enhanced performance. This fully synthetic oil provides exceptional protection and efficiency, with excellent cold start performance and fuel economy benefits. Ideal for both gasoline and diesel engines, it helps to maintain engine cleanliness and longevity through reduced wear and deposit formation.

Fuel Economy

The Comma SYN5L Syner-G is designed to provide improved fuel efficiency compared to conventional motor oils. Its full synthetic formulation allows it to flow easily when cold, reducing viscous drag in the engine. This results in less fuel being required to overcome friction and pump losses. The Syner-G also has low volatility, meaning it burns off more slowly and doesn't need to be topped up as frequently between oil changes. This reduces oil consumption and further improves fuel economy. Independent testing has shown around a 2-3% improvement in miles per gallon with Syner-G compared to standard mineral oils. For drivers doing high mileages, the fuel savings can quickly offset the slightly higher price of a full synthetic. Overall, the Syner-G provides motorists with a more economical driving experience without compromising on lubrication and protection.

Another excellent choice for drivers seeking efficiency is the Comma Pro-Tech Fully Synthetic 5W30 - 5 Liters. This oil is engineered for optimum performance in a wide range of vehicles, enhancing fuel economy through its advanced formula. Its superior thermal stability and low-friction characteristics contribute to efficient engine operation, ensuring that drivers experience less wear and tear. Comma Pro-Tech is particularly beneficial for modern engines, allowing for extended oil change intervals while maintaining high lubrication standards. Choosing Comma Pro-Tech also supports environmental sustainability by reducing emissions, making it a smart option for eco-conscious motorists.

Oil Change Intervals

Comma SYN5L Syner-G 5W40 is formulated to provide excellent protection for extended oil change intervals. The advanced full synthetic formula resists viscosity breakdown and oil thickening, allowing it to maintain its protective properties for a longer period of time between oil changes.

Many manufacturers now recommend oil change intervals of 10,000 miles or more, especially for newer engines. Comma SYN5L is well-suited to handle these extended intervals between services. The Syner-G technology keeps the oil in grade and prevents sludge formation, even after prolonged use. This allows motorists to follow the manufacturer's recommended oil change intervals confidently without worrying about premature engine wear.

Overall, Comma SYN5L helps enable extended drain intervals through its durable synthetic formulation. By resisting viscosity breakdown and maintaining its protective properties for longer, it allows motorists to safely go longer between oil changes without compromising engine protection. This can save time and money over the lifespan of the vehicle.

Cold Weather Performance

The Comma SYN5L Syner-G synthetic motor oil is specially formulated to provide excellent cold weather performance. The oil flows easily even in frigid temperatures, allowing for fast lubrication at start-up to prevent engine wear.

Many motor oils can thicken in cold temperatures, making it difficult for the oil to circulate and properly lubricate the engine. But Syner-G's advanced full synthetic formula maintains a low viscosity even below -30°C. This allows for rapid oil circulation and pumpability as soon as you turn the ignition in cold weather.

The oil also has a low pour point below -45°C, preventing it from gelling up in extreme cold. This ensures continued lubrication protection and avoids strain on the starting system during cold starts.

Overall, Syner-G provides exceptional cold cranking and pumpability. Your engine will start smoothly in cold temperatures thanks to the oil's high viscosity index and synthetic chemistry. This protects your engine against wear during cold starts and low temperature operation.

High Temperature Performance

The Comma SYN5L Syner-G motor oil provides excellent high temperature protection for your engine. It is formulated with fully synthetic base oils that have a very high viscosity index. This allows the oil to maintain a protective viscosity even when the engine heats up during operation.

The viscosity and film strength of SYN5L prevents the oil from thinning out excessively at high temperatures. This helps prevent metal-to-metal contact in the engine that can lead to increased friction and wear. Thick oil films also prevent the formation of deposits that can reduce engine efficiency.

In addition, SYN5L contains antioxidants that limit the oxidation of the oil at high temperatures. Oxidation can cause the buildup of harmful deposits and thicken the oil over time. By controlling oxidation, SYN5L maintains its protective qualities and resists thermal breakdown for extended drain intervals.

Overall, the robust formulation of this motor oil allows it to provide outstanding high heat protection. Drivers can rely on the SYN5L to keep their engine properly lubricated even during demanding driving conditions in hot weather. Its thermal stability helps maintain engine cleanliness and minimize wear.

Compatibility

The Comma SYN5L Syner-G 5W40 motor oil is compatible with a wide range of gasoline and diesel engines. According to the manufacturer, it can be used in vehicles from the following brands:

• Audi
• BMW
• Fiat
• Ford
• Honda
• Hyundai
• Kia
• Mazda
• Mercedes-Benz
• Mini
• Mitsubishi
• Nissan
• Peugeot
• Porsche
• Renault
• Seat
• Skoda
• Suzuki
• Toyota
• Vauxhall
• Volkswagen
• Volvo

The oil is suitable for both turbocharged and naturally aspirated gasoline engines, as well as most modern common rail diesel engines. It can be used in engines with particulate filters and catalytic converters.

Overall, the Comma SYN5L has very broad compatibility and can be used in most passenger vehicles from Asian, American and European manufacturers. It meets the specifications for a wide range of OEM standards, making it a good choice for mixed fleet use.

Oil Pressure

Proper oil pressure is critical for engine performance and longevity. This oil does a good job maintaining oil pressure within the normal operating range.

The viscosity of 5W-40 allows the oil to flow easily when cold for fast lubrication on start up. As the oil warms up and gets thicker, it provides adequate pressure for proper lubrication.

The synthetic base oils have high film strength, which helps prevent oil pressure drops under high temperature operating conditions. The anti-wear additives also help maintain oil pressure by reducing friction and wear.

Overall, this oil helps provide consistent oil pressure across a wide temperature range. Maintaining proper oil pressure reduces engine noise, friction, and wear. This can help extend the service life of the engine.

Pros

The Comma SYN5L Syner-G Full Synthetic 5W40 Motor Oil offers several key benefits that make it a great choice for many drivers.

• Engine Protection - This oil provides excellent wear protection, keeping critical engine components like pistons, rings, and cylinder walls from excessive friction and wear even under demanding driving conditions. The advanced formula resists oxidation and viscosity breakdown, maintaining its protective properties for extended drain intervals.

• Fuel Economy - Thanks to its full synthetic base oils and friction-reducing additives, Syner-G can help improve fuel efficiency compared to lower quality conventional motor oils. Less friction inside the engine means less wasted energy.

• Oil Change Intervals - The robust formulation allows oil change intervals to be safely extended versus standard mineral oils, saving time and money spent on maintenance. Comma states that under normal driving conditions, oil changes can be extended to 15,000 miles or 12 months.

• Cold Weather Performance - The 5W-40 viscosity grade provides rapid oil flow at start-up in cold temperatures, getting oil to critical components quickly and minimizing wear in winter weather.

• High Temperature Performance - Syner-G maintains its viscosity and resists thermal breakdown even under hot operating temperatures, keeping the oil film strong and protecting the engine.

• Compatibility - It is safe for use in gasoline and diesel engines from leading European manufacturers that recommend 5W-40 viscosity grade oils meeting ACEA quality standards.

• Oil Pressure - Additives help this oil maintain excellent viscosity and flow characteristics throughout its service life for consistent, reliable oil pressure.

Cons

While Comma SYN5L Syner-G Full Synthetic 5W40 Motor Oil offers many benefits, there are a few potential drawbacks to consider:

• Price - This is a premium synthetic oil, so it tends to cost more than conventional motor oils. The 5 liter jug has a list price around £35-40. For some consumers, the added cost may not be worth it over a cheaper conventional oil.

• Limited availability - Because it's a lesser known brand than Castrol, Mobil, etc., Comma oils can be harder to find in local auto parts stores. Many customers end up ordering it online instead. So it may be less convenient to purchase.

• Questionable quality claims - Comma states this oil meets VW 504 00 and BMW LL-04 specs, but some experts argue it may not truly meet the same stringent requirements as oils officially approved by German automakers. The oil likely offers sufficient protection, but Comma's claims are debatable.

• May not last full interval - While Comma states the oil can last up to 20,000 miles between changes, some reviewers report it starts to shear down and lose viscosity after 10,000-15,000 miles. It may not last the full interval that top-tier synthetics can.

Overall the disadvantages are relatively minor. But the higher price tag and remote possibility of slightly reduced engine protection may make some consumers think twice, especially for high-mileage or performance engines.