does it need premium gas?

 

altima coupe ? that was random...lol did you think you were posting in a different thread ?

What I want to know out of curiosity not that it really makes any difference is how much difference is there in performance from regular to premium other than better gas mileage.

will my G actually run a faster 1/4 mile with premium vs regular ?

 

Caddy's 3.6L Direct Injection V6 is rated at 304 hp at 6400 rpm and 273 lb-ft of torque at 5200 rpm on REGULAR 87 OCTANE! Direct injection changes everything!!

 

89 in the G and 87 in the Titan.

 

May be, I was refereing to this article:
http://www.motortrend.com/roadtests/...s/engines.html which contradicts your statement, but I guess we wouldn't know w/o a dyno run

 

Engines tuned for 87 do not gain power with higher octane fuel.

Engines tuned for higher octane gasolines will either lose power on lower octane, or not run properly (depends on the engine)

The G does not REQUIRE premium, but you WILL lose power AND fuel economy.

91 octane is recommended for maximum economy and performance. Using anything higher is just a waste of money.... like putting 89 or higher in a (non-si) civic

 

finally GM develops a 300HP DOHC V6. No wonder they are retiring their 197HP 3.8L this year.

 

If you are asking if the G really needs premium fuel... you should be asking yourself "Do I really need a G?"... Do you?

 

yeah, this is not even a question. I will skip a beer once or twice and pay for that extra money spent on premium!

 

with just over 120,000 miles on the G...... no problems with the engine.

80,000 miles were done on the cheapest gas available.

engine runs as good now and it did when it was new

 

Just completed a week with 87 octane. Did 340 miles of mixed city/hyw (25/75) with 16.1 gallons of gas. That equates to about 21mpg which is inline with what I get with 93 octane.

 

wow, i can't even make it to 20 mpg

 

The VQ engine has been optimized for different autos by tuning the compression - generally increasing as the years go by. The 03-06 6MT and coupe are tuned at a higher compression, get around 298 HP, are REQUIRE 91 AKI or better or you will damage them. They will run on 87 - but not well. The 03-06 auto making 280 HP has a lower compression and can run on 87 AKI. Nissan recommends 91 or better. The auto is tuned for 91, but the ECU will adjust (retard timing) if knocking is sensed. Using an AKI rating higher than recommended will not hurt the engine. Again, the ECU will attempt to maximized performance and will have an easier job with the high octane gas.

 

In other words, if the owner's manual says premium fuel required, use it. If it just says recommended, and you don't push the car hard, you can get by without downside with 87. If you push the car, go with premium.

 

Here is my findings from the past 10k miles of driving.

21 Plus Fill ups and
11 Premium fill ups


Miles Driven
Plus 6603
Premium 3663

MPG
Plus 19.88073709 (avg of 21 tanks)
Premium 20.37374635 (avg of 11 tanks)