in the booklet it says to use at least 87 octane. But inside hte gas door it says use 91 for best performance. Im just curious what u guys use.

 

I've been using 92, but during the winter I used 87. But with the knock sensor I don't think it really matters which grade you use. I know I couldn't tell any difference between the 2.

 

ran 87 in winter and I'm only gonna run 93 the rest of the year if gas prices dont jump up. I'd say run 93. I got about 17 mpg in city with 87 and i get 21-22 mpg in city with 93.

 

thanks alot for the replies

 

I use 93 as well.

There is a place in Springfield, MO that has 120 octane though... a few months ago it was about $4.25 a gallon too.

 

I only run 93. Monotuar you in KC?

www.cardomain.com/id/kappsmax

 

That's leaded though, and will damage your emmision devices.

I've only used premium... 91 sometimes 92 depending on the station. Out here in the west we get screwed.

 

Normaly the octane is determined by the refinery. Missouri has a state truck comming around sampling fuels about once a year. Varifying octaine and water content.

 

Premium all the way. But we only get 91 octane out West that I know of...

 

Nope, about an hour east of Springfield on I44.

 

where do you find 93 in KC?

I can only find 92, and that is only at BP/Amoco.

my 5th gen could use some 93 octane love..

-vq

 

biggestbelly - Whatever octane you settle on, do not switch back and forth. The Maxima computer takes several tankfuls to adjust between octanes, so frequent switching means the engine does not get fully adjusted to one octane before another is put in the tank.

 

Sunoco Has 94 Octane Premium Fuel

 

I only put 93 Octane in my 04 Sl. When I bought it the dealer said "don't put anything less then 93 Octane".

 

always use highest octane because the engines are new and also high octane takes longer to burn so it wont waist as fast yet it creates a better combustion which means more response, hp ratio from your engine. Some engines wont even start with low octane, but to be on the safe side and if you really want your car to run great over time then use 93-94 octane.

 

where do you guys pickup this crap?

 

LOL ture SteVTEC. 93 octane burns slower lol....

 

heres a direct quote from another car forum. "on most cars that are rated for use of 87 octane, there is no benefit to using higher octane fuel. the higher octane is basically a slower burning fuel so that it won't detonate (knocking) prematurely."

Im not looking to start any flaming i do mechanics in my school been doing it for 3 yrs and know for a fact that higher octane burns slower than 89 or less octane. Be my guest and do a research but that "LOL" and "where did u get that crap from" wasnt needed. Just do a research before you want to start up a flame.

http://forums.vwvortex.com/zerothread?id=1313222

Somewhere in the middle

 

heres another quote from a MPT forum "Fuel with higher octane ratings burn slower...that's IT. Buring slower allows the timing to be advance for better performance."

http://forum.mpt.org/messages/9/2448.html?1063044185

Scroll all the way down

 

this quote has to deal with gains of higher octane and the knocking noise i mentioned.

High octane fuels allow engines to produce more power because they allow more spark advance before pre-ignition occurs. It is of no benefit to put 100 octane fuel into an engine that doesn't have the spark advance dynamic range to take advantage of it.

Under warm cruise (closed loop) strategy, EEC will push the spark advance out to the point where trace knock is detected, and then back the timing off slightly, to keep away from pre-ignition. This strategy makes sense to get the most efficient burn and the most power. Under these conditions, you may hear some knock if you mash the gas, because it takes EEC a few CPU machine cycles and crankshaft rotations to drop out of closed-loop strategy and retard the timing.

Under wide-open-throttle (WOT) conditions, EEC is not looking at the knock sensor because the engine is simply making too much noise for the knock detection strategy to filter out the knock signal from the noise. Timing and fuel for WOT is derived from lookup tables that are vectored primarily by crankshaft RPM and engine coolant temperature, and to a much lessor degree by the mass air signal.

Under most conditions, EEC should be able to get the most out of any reasonable fuel that you pump into the tank, however, an especially bad load might be beyond the range that the spark lookup tables can compensate for, so pulling the octane shorting bar invokes a new set of tables, with less aggressive spark advance curves for WOT operation.

http://www.shotimes.com/SHO3gas.html

Im done doing research.
Take care and I hope you both understand that higher octane does burn slower.