I use castol edge full syntec in a 10w-30. I know a lot of guys run royal purple and amsoil. I simply prefer castrol because its cheaper, full syntech, and they do all kinds of testing to it and has all kinds of seals of approval an stuff.
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Amsoil is good stuff. That is what I put in the small engines I have and I do notice they run smoother. Stuff's not cheap though. 
Thanks for the replies all. I think it is good advice to just take the free oil changes. 12 free oil changes is is hard to pass up. Not sure if it is a Nissan funded thing or the dealership's idea to keep new car buyer's coming back. Never know, one of em (not me ) might buy the GT-R on the showroom floor. That is one sharp vehicle.
) might buy the GT-R on the showroom floor. That is one sharp vehicle.
your going to be saving yourself somewhere in the area of $300 taking the free ones, so go with that and by yourself a $300 toy like a programmer with the boost in fuel mileage that you get from most programmers it will pay for itself in less than a year (i'm a number cruncher when it comes to these things lol). its a good argument to use with your wife(or girlfriend) and with the programmer paying for itself in less than a year you can buy your girl a nice present too to keep her happy about it all
with the boost in fuel mileage that you get from most programmers it will pay for itself in less than a year (i'm a number cruncher when it comes to these things lol). its a good argument to use with your wife(or girlfriend) and with the programmer paying for itself in less than a year you can buy your girl a nice present too to keep her happy about it all
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