Best Engine Oils for Infiniti G37

Choosing the right engine oil for your Infiniti G37 is critical for maintaining its high-revving VQ37VHR engine. We researched manufacturer specifications, industry standards, and aggregated owner feedback to compare the top synthetic oils. This guide presents our findings to help you select the best oil for performance, protection, and value.

1. Mobil 1 Extended Performance 5W-30: Best Overall

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In our evaluation, Mobil 1 Extended Performance 5W-30 stands out as the top pick for the Infiniti G37. It meets the API SN Plus and ILSAC GF-5 standards, aligning with Infiniti’s recommended viscosity and quality. Owner feedback consistently highlights its ability to maintain stable oil pressure and reduce engine noise, even in spirited driving conditions. The oil’s advanced additive package provides sturdy protection against sludge and varnish, which is crucial for the G37’s variable valve timing system.

However, this oil isn’t the most budget-friendly option. If you change oil frequently (under 5,000 miles) or drive primarily in mild conditions, a less expensive synthetic may suffice. Also, some owners report that Mobil 1 can shear slightly in extended use, so sticking to recommended drain intervals is wise. Skip this if you prefer a lower-cost oil for short intervals.

• Meets or exceeds Infiniti recommended specs for G37
• Excellent thermal stability and deposit control
• Proven in high-mileage applications per owner reports

Pros: Strong wear protection and extended drain intervals; Widely available and trusted brand
Cons: Premium price compared to conventional oils

2. Castrol EDGE 5W-30 Full Synthetic: Top Performance

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Castrol EDGE 5W-30 is a strong contender for G37 owners who drive aggressively. Its Fluid Titanium Technology is designed to provide extra film strength under high pressure, which we found beneficial based on owner reports of sustained high-RPM use. The oil meets the latest API SN Plus and ILSAC GF-5 specs, ensuring compatibility with the G37’s emissions systems. Many owners note improved throttle response and quieter operation after switching.

Still, Castrol EDGE is priced at a premium, and some users report that it may not hold up as well in extended drain intervals compared to Mobil 1. If you follow the manufacturer’s 5,000-mile oil change schedule, this is an excellent choice. But for those seeking maximum longevity between changes, other options may be better.

• Fluid Titanium Technology strengthens oil film under pressure
• Excellent high-temperature performance for spirited driving
• Meets GM dexos1 Gen 2 and ILSAC GF-5

Pros: Great for performance driving and track use; Reduces engine friction for smoother operation
Cons: Can be more expensive than similar synthetics

3. Pennzoil Platinum Full Synthetic 5W-30: Best Value

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Pennzoil Platinum 5W-30 is our pick for the best value synthetic oil for the G37. Its PurePlus Technology produces a base oil that’s 99.5% free of impurities, which we verified from manufacturer data. Owner feedback indicates it provides reliable protection in daily driving and moderate performance use. It meets all necessary specs and is often priced lower than Mobil 1 or Castrol EDGE.

However, in our research, some owners reported slightly higher oil consumption with Pennzoil Platinum compared to other synthetics, especially in high-mileage engines. If your G37 is used for heavy towing or track days, you might prefer a more durable oil. For normal street driving, this is an excellent cost-effective option.

• PurePlus Technology uses natural gas for cleaner base oil
• Excellent cold-start protection
• Competitive price for full synthetic performance

Pros: Great value for a premium synthetic; Clean-burning formulation reduces deposits
Cons: May not offer the same extreme wear protection as top-tier oils

4. Valvoline Advanced Full Synthetic 5W-30: Solid All-Rounder

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Valvoline Advanced Full Synthetic 5W-30 is a dependable choice that we found to be a solid all-rounder. It meets the necessary API and ILSAC standards, and owner reviews generally report satisfactory performance in the G37. It offers good protection against sludge and deposits, and its price is often lower than Mobil 1 or Castrol.

Still, some users note that it may not last as long in extended drain intervals, and a few have reported slightly higher engine noise compared to premium oils. If you change oil every 5,000 miles and drive moderately, this is a fine option. But for those seeking maximum performance or extended intervals, consider a higher-tier product.

• Advanced additive system for deposit control
• Good high-temperature viscosity retention
• Affordable price point

Pros: Reliable protection at a lower cost; Meets all manufacturer requirements
Cons: Not as refined as premium synthetics

5. Royal Purple High Performance 5W-30: Performance Enthusiast

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Royal Purple High Performance 5W-30 is a favorite among G37 owners who track their cars or demand maximum performance. Its Synerlec additive is designed to reduce friction and heat, which we found beneficial based on owner accounts of track use. It meets API SN standards and is often used in modified engines.

However, this oil comes at a significant premium, and some owners report increased oil consumption in street-driven G37s. Also, it doesn’t meet the latest API SN Plus specification (though it’s backward compatible). If your G37 is a daily driver, the cost may not be justified. Skip it if you prioritize value or follow standard drain intervals.

• Synerlec additive technology for reduced friction
• Popular among performance enthusiasts
• May improve horsepower in some applications

Pros: Excellent for high-performance driving; Reduces engine wear under stress
Cons: Premium price, not cost-effective for daily driving; Some reports of oil consumption in high-mileage engines

6. Liqui Moly Leichtlauf High Tech 5W-30: German Engineering

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Liqui Moly Leichtlauf High Tech 5W-30 is a premium German oil that some G37 owners use, but it isn’t specifically designed for Japanese engines. It meets API SN and ACEA A3/B4, which is a thicker formulation than typical ILSAC oils. While it provides excellent cold-start protection and thermal stability, the higher HTHS viscosity may slightly reduce fuel economy and could affect the variable valve timing system in some conditions.

Owner feedback is mixed: some report smooth operation, while others note slightly sluggish response. Also, it’s harder to find and more expensive. We recommend this only if you prefer European oil specifications and don’t mind the potential trade-offs. Most G37 owners will be better served by a standard ILSAC oil.

• German-engineered for European vehicles
• Excellent cold-start properties
• Good thermal stability

Pros: High-quality base oils; Reduces engine wear in cold climates
Cons: Higher price and limited availability; ACEA A3/B4 may not be ideal for G37's emissions system

7. AMSOIL Signature Series 5W-30: Ultimate Protection

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AMSOIL Signature Series 5W-30 offers the ultimate protection and extended drain capability, but it comes at a steep price. Based on our research and owner feedback, it provides outstanding wear protection and maintains viscosity over long intervals. It meets all relevant specs for the G37 and is a favorite among enthusiasts who keep their cars for many years.

However, the high cost makes it impractical for most drivers who follow the recommended 5,000-mile oil change schedule. Also, it can be difficult to find in local stores. Skip this unless you plan to run extended drains (10,000+ miles) or drive your G37 in extreme conditions. For typical use, a more affordable synthetic will suffice.

• Designed for extended drain intervals up to 25,000 miles
• Superior wear protection and deposit control
• Meets or exceeds all major specifications

Pros: Exceptional longevity and protection; Great for high-mileage or severe use
Cons: Very high cost per quart; Overkill for standard 5,000-mile intervals

Frequently Asked Questions

What oil viscosity does the Infiniti G37 require?

Infiniti recommends 5W-30 viscosity for the G37 in most climates. For extreme cold, 0W-30 may be used. Always check your owner’s manual for specific recommendations.

Can I use 0W-20 oil in my G37?

It isn’t recommended. The VQ37VHR engine is designed for 5W-30. Using 0W-20 may lead to insufficient oil film strength at high temperatures and potential engine damage.

How often should I change the oil in my Infiniti G37?

Infiniti recommends oil changes every 5,000 miles or 6 months for normal driving. Severe driving conditions (frequent short trips, towing, track use) may require more frequent changes. Always follow the maintenance schedule in your owner’s manual.

Is synthetic oil better for the G37 than conventional oil?

Yes, synthetic oil is highly recommended for the G37. It provides better protection at high temperatures, improves cold-start flow, and resists breakdown better than conventional oil. Most G37 owners use full synthetic 5W-30.

Can I mix different brands of synthetic oil?

While it’s generally safe to mix synthetic oils of the same viscosity and specification, it isn’t ideal. Mixing can dilute the additive packages. For best performance, stick with one brand and type.

Our Verdict

After researching and comparing the top oils, our top pick is Mobil 1 Extended Performance 5W-30 for its excellent protection, durability, and widespread availability. The runner-up is Castrol EDGE 5W-30, which offers superior high-temperature performance for spirited driving. Choose based on your driving style and budget.

Video Guide

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