I second that - unless you have oil temp issues, running 20-50 is not a good idea.
I run a 20-50 in my road race car because we have measured oil temps to prove that it's necessary. The cars run HOT. Running a 20-50 in a car that doesn't need it will reduce WHP.
I would recommend running a 10-30 synthetic. The closer the two numbers are (10 - 30 in this case), the fewer viscosity thickeners are needed to create the multigrade properties. Synthetics use fewer thickeners than organic oils because they tend to have multigrade properties without the use of these thickeners.
These thickeners are fairly large molecules that can easily get sheared under high stress conditions. Once they are sheared, your oil may not quite be a 10-30 oil - hence the need to change your oil every once in a while.
Synthetics also tend to have more detergent properties. One of the jobs of your motor oil is to capture and suspend some of the byproducts of combustion and keep your engine clean.
Will all this make your engine last longer? Maybe, maybe not - but if you own an NSX and you care about performance, why wouldn't you want the higher margin of protection?
I run a 20-50 in my road race car because we have measured oil temps to prove that it's necessary. The cars run HOT. Running a 20-50 in a car that doesn't need it will reduce WHP.
I would recommend running a 10-30 synthetic. The closer the two numbers are (10 - 30 in this case), the fewer viscosity thickeners are needed to create the multigrade properties. Synthetics use fewer thickeners than organic oils because they tend to have multigrade properties without the use of these thickeners.
These thickeners are fairly large molecules that can easily get sheared under high stress conditions. Once they are sheared, your oil may not quite be a 10-30 oil - hence the need to change your oil every once in a while.
Synthetics also tend to have more detergent properties. One of the jobs of your motor oil is to capture and suspend some of the byproducts of combustion and keep your engine clean.
Will all this make your engine last longer? Maybe, maybe not - but if you own an NSX and you care about performance, why wouldn't you want the higher margin of protection?