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.

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.

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.

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.

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

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

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

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.

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.

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.

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.

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.

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

Sams Club 93 for me