Posted: Apr 09 2008 at 7:33am | IP Logged

I don't forsee 10% becoming mandated on every octane across the country.  A lot of people still own cars like my 90 maxima that cannot run the 10% ethanol as it destroys our injectors. 

Besides, the cons of how much ethanol is really costing is starting to show it's ugly head.   

BTW cpow, just mix in some Dextron III into your diesel with the low-sulfur, and you'll be good to go.

Posted: Apr 23 2008 at 9:08pm | IP Logged

• use of synthetic oil in the engine
• use of synthetic oil in the differential
• use of premium fuel
• Maintaining 60-65 mph on the freeway
• slow acceleration

• unless we KNOW that our engine controller WILL ADJUST ITSELF (i.e., by retarding timing?) to avoid knock, and:
  
• the use of 87 octane in this engine CAN CAUSE knock

Posted: May 05 2008 at 5:19pm | IP Logged

I have a 2006 Frontier 2.5L with about 25,000 mles on it. It has been somewhat disappointing in the gas milage too. Around town (Houston suburb) I get about 21 mpg on regular with 10% ethanol (sometimes more % at some stations since I shop cheapest gas). But I expected more on highway and it only went to 22 mpg. I am an "old" '83 Nissan King Cab guy who put over 196,000 on the 2.4 liter over 15 years. It had the carb instead of FI and was best vehicle I ever owned bar-none. It got 25-26 mpg in town and on trips with bed loaded (with daughters college apt furniture) and rolling hills it managed 30 mpg. Geez I miss it!

I have always done my own upkeep and maintenance as much as possible, but this "new" Frontier is very hands off except for oil changes and brakes. On the old one after 100,000 mi I had to fix one A/C leak, later replace one alternator, later one water pump, one front brake caliper and one freeze plug. Everything else was original including clutch and I drove the heck out of it. The engine started dying and leaving me on side of road and after all kinds of trouble shooting decided I couldn't afford a $700 carb so I sold it. Cry, cry!

Any tips would be appreciated.

Posted: May 25 2008 at 11:26am | IP Logged

I have a 2005 NISMO crew cab 4x4 and the best I ever got was 19.5mpg running at 65 - 75 mph all highway driving.

Regular driving for me (70% highway at 75 mph ave & 30% city stop & go) gets me between 16 - 17.2 mpg.

Remember the way that they rate trucks is based on a 50 mile run at roughly 50 - 52 mph max without stops in optimum conditions (no hills). 

My truck gets about 13.5 mpg when I tow my 17' Lund ProSport (fully rigged with 90hp & 9.9hp, full tank of gas, downriggers, all equipment).

Should have kept my Avalanche.....at least it didn't go through a driveshaft assembly, a head replacement, and spent more than half of its time in a stealership in the past 4 months like my Nissan has.

Posted: Jun 21 2008 at 9:23pm | IP Logged

I am a newb to this site but I love it. On MPG, I just bought a 2008 Frontier SE Crew cab. I have been keeping up with MPG religuosly(sp) since i bought the truck. I have been averaging 20MPG. The highest I have gotten is 24MPG on a road trip to Nashville. 80% of my driving pattern is between 50mph and 60 mph on two lane roads. It is totally stock with a bed cover and using the 83oct.  I broke it in per the manual and am pretty light footed. Like some of you guys, I feel your driving patterns and how heavy your foot is, plays a big factor in MPG. The gas that I used when I got the 24MPG was Sams Club gas. I now have 2500 miles on my truck.