New Oil Specifications

New Oil Specifications

Many 0W16 oils have a new donut certification mark on the bottle called API SN-PLUS and SN-PLUS Resource Conserving.

You may have noticed that some Toyota and Honda four-cylinder vehicles require SAE viscosity 0W16 oil. You may also have noticed it in the catalog pages or on the shelves of your oil supplier. The oil really stands out – the last number is strange because it does not end in a five or a zero. 

Is this a brand-new product? What do we need to know about it?

Actually, 0W16 oil has been around for almost two decades in Japan and is designed to increase engine efficiency and reduce engine warmup time. In the U.S., 0W16 oils were going to be part of the ILSAC GF-6 oil rollout as GF-6B oil. What is significant about GF-6B oils is that the specification will not be backward compatible because of the new viscosity grades. 

GF-6A lubricants are backward compatible, meaning that GF-6A engine oils of the appropriate conventional viscosity grade are acceptable for use in cars whose owner’s manuals recommended previous GF categories (GF-1 through GF-5). GF-6B engine oils should only be used when recommended by the OEM (follow the owner’s manual). 0W8 is another planned viscosity that will be in the GF-6B category.

GF-6 oils have been delayed due to a debate over some of the test sequences and test engines. But, OEMs planned the implementation of new engine technology years in advance. OEMs like Honda and Toyota prepared for the rollout and availability of GF-6B oils many years ago. This is why you are seeing 0W16 oils before you will see GF-6 oils.

SN-PLUS

Many 0W16 oils have a new donut certification mark on the bottle called API SN-PLUS and SN-PLUS Resource Conserving. On the bottle, you may also see OEM certifications for Honda and Toyota.

According to API, SN-PLUS standards are formulated to provide API SN performance and additional protection against low-speed pre-ignition for engines with direct injection and turbocharging. SN-PLUS formulations can effectively lubricate engines calling for API SN, API SN with Resource Conserving or ILSAC GF-5 oils.

0W16 OR 0W20?

The big question among shops is how can four points on the viscosity rating change the performance and longevity of the engine? This is data that is difficult to come by, much less evaluate.

The one indisputable document is the owner’s manual. For the 2018 Fit, Honda recommends a 0W16 or 0W20 API-certified oil. For the 2018 Camry with the A25A-FKS 2.5L four-cylinder engine, Toyota recommends 0W16 oil that meets API SN Resource Conserving standards. But, in the next paragraph, the manual states, “If 0W16 is not available, 0W20 oil may be used. However, it must be replaced with 0W16 at the next oil change.”

Both owner’s manuals and service information say that 0W16 is the best choice for fuel economy and cold-weather starting.

Is there an easy answer to the 0W16 or 0W20 argument? Yes: if you want to keep your customers happy, use 0W16 oil. Can you use 0W20? Both OEMs say it can be used in a pinch when 0W16 is not available.

THE EPA’S ROLE

Whenever a vehicle’s fuel economy for the window sticker is validated by the EPA, the oil in the crankcase must be on the market and available to consumers. This prevents OEMs from using exotic lubricants for engine oil that could influence fuel economy.

Increasing fuel economy standards taking effect in 2025 are the reason why both domestic and import automakers will be making the switch to 0W16 in the future, and then a switch to 0W8. According to some engineers and oil companies, the small reduction of four viscosity points can improve fuel economy by as much as 2%.

IS HEAVIER BETTER?

If you are concerned that lighter oils offer less protection, you have to realize that engines have changed. Most new engines feature an oil pump that can deal with these lighter-weight oils.

Variable-displacement oil pumps can deliver the correct volume and pressure using lighter-weight oils and create less drag on the engine. These pumps are far more sophisticated and are often electronically controlled. Even if that does not change your mind, consider the variable valve timing actuators. If the oil is not the right viscosity, it can cause sluggish performance of the actuators that can cause codes and driveability problems.

You May Also Like

Why Do Timing Chains Stretch?

As the timing chain wears, it can change the timing of the camshaft and crankshaft.

Timing chain stretch is not the stretching of the timing chain’s links, it is an elongation of the timing chain caused by wear to the chain’s components. The most common cause of timing chain stretch is lack of regular oil changes.

Worn-out oil can no longer lubricate the chain and will cause the rollers and links to wear against each other. As the chain runs around the camshaft and crankshaft gears, the movement between the rollers and links causes wear and elongation.

Carbon Deposits and Direct Injection Engines

The primary cause of these problems is that fuel and added detergents are not hitting the back of the intake valves.

Acura Turbo Engine Service

It is important to check the operation of the solenoids that control vacuum to the actuators.

Subaru EJ25 Head Gasket Problems

Most of the EJ head gasket failures occur around the 100,000-mile mark and start as a slow oil or coolant leak.

Honda Electronic Throttle Body Service Tips

Using care and following OEM procedures will help you to avoid unnecessary parts replacement and comebacks.

Other Posts

Toyota Invests Big In Batteries

With an $8 billion investment, Toyota plans for 10 new BEV/PHEV battery lines by 2030.

Toyota Adopts Tesla Charging Standard For Future EVs

With NACS, customers will have access to more charging options, especially DC fast chargers, says Toyota.

Hyundai & Kia Hybrid Drivetrain

The Hyundai hybrid system has a motor control unit (MCU) and hybrid control unit (HCU).

Different Nameplates, Different Expectations

One thing Asian nameplates share is that the system voltage must stay in a specific range during the reflashing procedure.