Gas types

The Gas and Diesel Engines - VQ40De, VK56DE, YD25DDTi, V9X, Transmission, Transfer Case, Oil, Differentials, Axles, Exhaust...

Moderator: volvite

kpath
Posts: 11
Joined: Wed Oct 30, 2013 10:55 pm
Location: MD

Gas types

Postby kpath » Sun Dec 08, 2013 11:06 am

Hello all! Just wondering what type of Gas you use your pathfinder?
Exxon, Citco, Mobil, Aamco Sunoco, any others I forgot.

Just trying the best gas that work well with pathfinders?
What percentage do you use 79 87 93

I my question is trivial but was curious. I did a search I didn't see anything on gas. But I could have missed it.


User avatar
smj999smj
Site Admin
Posts: 5809
Joined: Sun Jan 22, 2012 11:13 pm
Location: Prospect, VA

Postby smj999smj » Sun Dec 08, 2013 2:21 pm

I use regular 87 octane unleaded in my 06, usually from Sheetz or Citgo. Occasionally I do 400+ mile trips from VA to NJ and I've found no difference in MPG whether I used regular or premium unleaded. Unless you are towing or have a performance tuned ECM, there really is no reason to pay the extra money for premium.

User avatar
NVSteve
Sponsored Member
Posts: 1985
Joined: Thu Feb 01, 2007 11:27 am
Location: Salt Lake City

Postby NVSteve » Sun Dec 08, 2013 5:08 pm

We have 85, 87, 88, 89, 91 & 93 octane to choose from. I've been running 88 or 89 in Utah, and 87 wherever 88 isn't available. I've tried premium before, but that wasn't in-state.

User avatar
shaggyT
Posts: 62
Joined: Thu Nov 28, 2013 10:19 pm
Location: NYC

Postby shaggyT » Sun Dec 08, 2013 6:57 pm

All I run in my Pathy is 93. Mostly Mobil, but sometimes Hess or Shell depending on how far the next Mobil is. I feel the truck runs better on 93, especially in the brutal winter here.

User avatar
akley88
Posts: 449
Joined: Sun Mar 03, 2013 1:45 pm
Location: United States

Postby akley88 » Sun Dec 08, 2013 7:27 pm

I can get sunoco up to 113 pump around here. I always run 92/93. I prefer sunoco

User avatar
shaggyT
Posts: 62
Joined: Thu Nov 28, 2013 10:19 pm
Location: NYC

Postby shaggyT » Sun Dec 08, 2013 7:34 pm

Woah, didn't even know there was 113. LOL, I though 93 was the highest.

User avatar
akley88
Posts: 449
Joined: Sun Mar 03, 2013 1:45 pm
Location: United States

Postby akley88 » Sun Dec 08, 2013 7:45 pm

shaggyT wrote:Woah, didn't even know there was 113. LOL, I though 93 was the highest.
I live near a drag strip.118 is the highest I have seen till a switch to meth or alcohol

User avatar
Zen_master
Posts: 264
Joined: Fri Apr 12, 2013 7:42 pm

Postby Zen_master » Sun Dec 08, 2013 8:23 pm

Whatever "brand" is cheapest. 87 octane mostly though I recently realized a noticeable decrease in fuel economy with no change in driving patterns. My suspicion is it is due to winter blend fuel having more ethanol per volume, but I'm experimenting with 93 octane on this most recent fill up to see if there's any improvement in fuel economy.

I do know the 310hp 388lb/ft output numbers posted on the VK56DE equipped R51 is on 93 octane. Not sure what the numbers are on 87 octane. If I don't see improved fuel economy on 93 I don't see a need to run premium fuel. I'm not hot rodding enough to warrant the extra 20-30 cents a gallon.

not on the rug
Posts: 250
Joined: Mon Jul 01, 2013 11:00 am

gas

Postby not on the rug » Mon Dec 09, 2013 7:30 am

I've found that running premium (91 or 93) gives me enough boost in mpg that I basically get enough mileage to counter the cost of buying it over regular. and premium gives premium performance. so I run premium.

forgottenzone
Posts: 169
Joined: Tue Apr 12, 2011 6:11 pm
Location: North Jersey

Postby forgottenzone » Mon Dec 09, 2013 10:35 am

93 octane all the time. No brand particular.
Dont come out if my pocket. Plus with all mods. I want most out of it all the time.

User avatar
doctahjones
Posts: 844
Joined: Tue Nov 16, 2010 11:08 am
Location: aurora, co

Postby doctahjones » Mon Dec 09, 2013 1:06 pm

91/93 (whatever is highest at particular pump).

i generally prefer shell or chevron. no particular reason, just personal "feeling" about the quality of their gas (yeah, i know there's probably -no- difference between them and grocery store gas). i also tend to hit newer stores than older ones, i figure newer tanks would have better quality gas as well.

before i had the bullydog, i did find that at least on highway trips i could get an extra 1-2mpg on premium vs regular, however the price difference between 87 and 91 would negate the mpg boost. around town i didn't notice a mpg difference, but i would occasionally hear a ping with 87.

but since i've had the BD, it's always premium.

User avatar
HLEGuitars
Posts: 22
Joined: Thu Nov 28, 2013 2:50 pm
Location: State College, PA

Postby HLEGuitars » Fri Dec 13, 2013 11:11 am

Unless the Pathy is loaded, or its very very hot out, I run 87

If it loaded, im towing, or its very very hot out.... i'll top off with 93 and keep using that until it either cools down or the trip is over!


Running higher octane gas, in most cases, will reduce your gas mileage as it is harder to burn than lower octane (and thus resists detonation better under the same conditions)

there are two ways to reduce the chance of detonation in a given engine... higher octane or more fuel (or both)

fuel computers that allow you to lean out your car for better gas mileage take one of those preventative measures away by leaning out your fuel mixture, and, in turn, raising the cylinder head temperature, and therefore, running higher octane is a good idea!



People say, well, my car says to put 87 in the tank, but then why does it better on 93 than it does on 87.

Most of the time its because the engine and fuel system are older and have some kind of fuel / air delivery related problem.

Carbon deposits in the cylinder heads can cause predetonation becasue they hold heat between cycles and ignite the fuel / air charge before the spark plug ignites.

leaks in the intake system can lean out the fuel air mixture by allowing unmetered, and thus, un fueled air into the charge. This is more common than you might think!!!

the fuel injectors also can get clogged or worn, their spray pattern less efficient and put less fuel into the charge (or MORE fuel as well, but that creates a different problem)

The O2 sensors on modern vehicles go a long way to helping with these problems.. but, they don't monitor each cylinder individually, thus the puter gets a "smoothed over" reading on the combustion efficiency and the "problem child" might not get the attention he needs as fuel is corrected over the entire system.

thus, as a vehicle ages, it may require a higher octane gasoline than it was designed for to operate as smoothly as it once did.

kpath
Posts: 11
Joined: Wed Oct 30, 2013 10:55 pm
Location: MD

Postby kpath » Sun Dec 22, 2013 11:04 am

Thanks all for your replies very helpful.
I've been running 93% in my path.
I use mobil exxon and shell

User avatar
DreamerzCC
Posts: 32
Joined: Thu Mar 24, 2011 7:28 am
Location: Hoover, Alabama

Postby DreamerzCC » Wed Jan 08, 2014 1:36 pm

Sams Club 93 for me


Return to “R51 Engine, Driveline and Powertrain”