hmmm. before i got the truck i downloaded the complete 2008 user manual that comes with the truck. on page 479 (in the PDF) it says:Greybrick wrote:From the 2008 service manual the Nissan recommended fuel for both the VQ40 and VQ56 is 'Unleaded gasoline with an octane rating of at least 87 AKI (RON 91)', ie: regular fuel.
The manual further goes on to state that for drag strip guys like BMX or for hauling a trailer for example, 'for improved performance', Nissan recommends the use of unleaded premium gasoline with an octane rating of at least 91 AKI (RON 96)'. Somewhere I've read that some places in the US you can still get the higher octane race type fuels with ratings of around (RON 120+)...now that stuff should at least give some real performance improvement. :)
The owners and service manuals give some further reading about other types of oxygenated fuels, ie: as in 'DO NOT USE E-85 IN YOUR VEHICLE'.
Local regular gasoline has been working for me but YMMV.
Click on 2008 Nissan Pathfinder service manual