Used Mobil 1 in my Mustang GT and I use it in little Civic sedan right now. Plan on using it with my 370Z when I get it.

Here's the problem with voting on oil; You can't see or feel how well the oil works on a daily driver. The power of suggestion plays a big role here.

If you used the cheapest oil vs. the best oil for a few years, you'd likely not notice a difference and you can't test without a control. How do you judge the oil? That being said, I've heard good things about Mobil 1 and its a decent price and easy to find.

My 2 cents.

i've always used mobil until recently i switched to Castrol, both are great.

I have used Amsoil since the seventy's, and have always had good results.

No scientific info of any kind just observation. Years ago the oil change interval was 5k. If anything the engines and oils are better now than they used to be. The 3k interval seems like a gimmick. Again all anecdotal info but my Jeep is LUCKY to see an oil change at 5k and it runs great with 200k miles.

I pick up my vehicle tomorrow and will follow the manufacturer spec for the first oil change and then change between 3 - 5k.

Since the 370Z is a sports car, Nissan most likely calculated that drivers will be a bit harder on the Z; dino changed at 3K is not so bad on the Z; synthetic at 5K will do the job too.

whats the manufacturer suggestion for first oil change... sorry im too lazy to go to my car =(

I know 4K-5K for oil changes should be fine, but I grew up changing the oil every 3K miles and I just cannot go that long. I use Mobil 1 and the car is a daily driver, but I do drive aggressive when I get the chance. No matter, once I see that odometer go past 3K miles it bugs me until I change the oil. can't help it, so I just change the oil every 3K miles, even if it is a waste of money.

I think the book says 3750 miles between changes.

I switched from Nissan oil to Castrol Edge last weekend. I haven't really noticed any marked difference in the car yet. I did notice that the oil (castrol Edge) is much darker than most other oils I have used, not that it means a thing.

On kind of a related topic... Changing the oil in this Z has got to be one of the, if no the, easiest oil changes I have ever done.

does the boook say anything for mileage on the FIRST oil change?

I think I'm going to take my Z in around 2000 miles.

^ +1 Ditto.

Hey SoCal, let us know when you find out whether or not we can use an evacuator on the Z.

Will do, as I am anxious to learn about that as well; it will make oil changes sooooo much better, and easier.

next door neighbor worked as engineer for ford for 15 years before moving to az to work for intel... he says that choice of brand has little to no bearing on thermal capacity or long-term engine reliability and that weight and viscosity are the key parameters... he claims that ford tested this for years and that was the conclusion every single time... just figured i'd share that - personally, i have no technical opinion... i'll prob just go mobil 1, b/c i used to work at mobil oil way back when