Originally Posted by tjkjunior

I saw that Infiniti is using Quaker State oil. If that is true, I would actually recommend taking your car to the Nissan dealership. The class that I'm in at my college right now is Automotive Engine Diagnosis. We did visual comparisons of different oils of most popular brands when they were fresh out of the bottle and we could actually see very tiny particles of something in the Quaker State oil. We nickname that kind of stuff "swill" in my class. All the other oils that we looked at looked normal including some synthetic Mobil 1. The Quaker State oil that we looked at was petroleum based so I can't really comment on their synthetic products. I personally use synthetic oil in my 2003 G35 and it works great. I run my 1993 Nissan Sentra SE-R on petroleum based oil and it runs great too, even with 190,000 miles on it. The major benefit of synthetic is that it has a wider operating temperature range and resists thermal breakdown better than petroleum based oils. So personally I don't think that it matters what type of oil you use. I would definatly go with synthetic if you run your engine hard though. I just thought I'd write about my personal findings about Quaker State. After seeing those tiny particles I would never personally use their petroleum based oils.

Originally Posted by benbo5

Thanks Gee35 for your advice. Im more than willing to drive up to Atlanta to do all my servicing, it really gives me an opportunity to get away for the day and go to Atlanta. Plus they will have a loaner ready for me when I get there. I really dont trust the guys over at a nissan dealership for the fact that they do not service many infinitis im sure, and I know the infiniti will take better care of my baby since I bought it there to begin with. Should I tell them I only want synthetic oil when I go? thanks