Originally Posted by Infiniti Chica

I understand what you're saying... this can be a frustrating process. In general, this topic has pretty well been covered both here and on the 350Z forum. If you go just based on used oil analysis (UOA's, as opposed to opinion and feeling) for our engine, some (not an exhaustive list) of the best synthetics have been:

Mobil 1 0w-40 (not 5w, 10w, etc.)
Castrol Edge
German Castrol
Penzoil Platinum
Pennzoil Ultra
Amsoil


With respect to filters, the most recommended and highly regarded (again, not an exhaustive list) have been:

K&N
Purolator Pure One
Mobil
Bosch
Wix
Napa Gold
Royal Purple
Amsoil

What has been agreed upon by most here and on other forums is that Fram and the Wal-Mart brand filters are among the cheapest and most poorly made filters. The UOA data collected from hundreds of VQ engines would strongly suggest otherwise. Some oils, such as Mobil 1 10w-30 (and several others) have wear numbers that indicate higher concentration levels of certain metals in the oil and TBN numbers that don't make for a good oil for our engines.

OP, I hope this helps. With respect to your tire question, go to both Consumer Reports and Tirerack for some very thorough reviews, comparisons and customer feedback.

Hope this helps.
Isa

Originally Posted by Blink210

My apologies for the thread jack... But do these oil recommendations apply to FI vehicles with stock block?