Moderator: volvite
Right now I am just going to get an average over the next few tanks after adding fuel system cleaner/injector cleaner, proper tire psi, air filter, etc (all the normal non-invasive type of items).disallow wrote:The best thing to do now is be vigilant. Monitor your FE over several tanks and see if you get the same results. I wouldn't advise taking a calcuation off of one tank, especially given the track record our pathys have with regards to the level sending units.
Once you have the data, the next step is diagnosis (provided the FE is still unacceptable). Start with easy stuff, plugs, seafoam, check for diagnostic codes. I have a superchips tuner that gives you a good look at the internal functioning of the engine, including engine load, and readings from the O2 sensors.
From there, you can look at replacing aged hardware on the engine. MAFs are known to go bad, as well as primary O2 sensors.
Did you show any CELs? What mileage did you have when you did the replacement of the O2s?disallow wrote:I changed my primary O2s and had significant results. Highway cruising FE went up by around 30-40%. My truck is older and has higher miles than yours though...
See my posts here:
http://www.thenissanpath.com/viewtopic.php?p=35925
and:
http://www.thenissanpath.com/viewtopic.php?p=36049
If you run high octane, there is no ethanol.kelleyo wrote:Have you subtracted a % of the rated MPG for using Ethanol laced gasoline?
http://www.cleanmpg.com/forums/showthread.php?t=11342
No CELs. Just really crappy mileage. I didn't think I had a performance issue, but after the change, the engine is much more responsive, and towing it was much much better.Rapscallion wrote:Did you show any CELs? What mileage did you have when you did the replacement of the O2s?disallow wrote:I changed my primary O2s and had significant results. Highway cruising FE went up by around 30-40%. My truck is older and has higher miles than yours though...
See my posts here:
http://www.thenissanpath.com/viewtopic.php?p=35925
and:
http://www.thenissanpath.com/viewtopic.php?p=36049
? Around here all grades (87, 91, and 93 octane) have 10% ethanol.disallow wrote:If you run high octane, there is no ethanol.kelleyo wrote:Have you subtracted a % of the rated MPG for using Ethanol laced gasoline?
http://www.cleanmpg.com/forums/showthread.php?t=11342
Gasoline has 6% more energy content than Gasohol. So a 6% drop, although significant, is only 1.2MPG if you average 20MPG on non-ethanol treated gas.
t
I have found several stations that sell Non-Ethanol gas. I always fill my boat there and my cars when convenient.skinny2 wrote:And that's if you're lucky. I have a friend with classic cars and he tests fuel at times and has found upto 30% in some fuels.kelleyo wrote: Around here all grades (87, 91, and 93 octane) have 10% ethanol.
My bad. I should qualify that here in Canada, and everywhere else I have travelled to in the states (MN, ND, SD, MO, IL, WI) advertise that there is no ethanol in their premium fuel.kelleyo wrote:? Around here all grades (87, 91, and 93 octane) have 10% ethanol.disallow wrote:If you run high octane, there is no ethanol.kelleyo wrote:Have you subtracted a % of the rated MPG for using Ethanol laced gasoline?
http://www.cleanmpg.com/forums/showthread.php?t=11342
Gasoline has 6% more energy content than Gasohol. So a 6% drop, although significant, is only 1.2MPG if you average 20MPG on non-ethanol treated gas.
t