Originally Posted by danops

On the VQ37VHR Motors, we use Eneos 5w40 and 0w50 full synthetic and the Nissan/Infiniti Ester Oil. The Ester oil that Nissan/Infiniti recommends is to reduce valvetrain noise... the Ester oil will stick to the valve just a little longer to reduce the noise.

I have a reputable source that informed me that switching to fully Synthetic Eneos 5w40 or 0w50 will provide the same, if not better protection, performance, and enhanced lubrication in this VQ37VHR. It should not void the factory warranty. Performance gains can be upwards of 5whp over Mobil1 and other leading synthetics. The 0w50 is the ultimate performance oil that will protect the motor from cold starting temperatures to very high temperatures.


P.S. Infiniti G37 owners sometimes complained of valvetrain noise and then the manufacturer created a TSB to recommend the use of Ester oil to cover up the valvetrain noise.