Fuel choice...
 

Hi everyone. I'm a new 2013 FRS owner and I was hoping to get some opinions on what fuel I should choose. In my area there are pretty much two options; 91 octane no-ethanol or 93 octane 10% ethanol. Which would you suggest? Thank you for any replies.

I'd go with the 93 whenever possible

Oh, I reckon for average driving, just pull into any name brand station and punch the button for the most expensive gasoline they offer .....;)


humfrz

As a DD with no real concern for top performance I generally go with 91. Not because it is cheaper but simply because it is handy for me. As a side effect I rarely have crickets unless I go with something with ethanol (could be coincidence though).

93 for the max powah!

91 E0 will get the crickets to shut up.

For me, it's a bit of a toss-up. The car seems to run a bit better on the 94 E10 that we have here, but the crickets get a little drunk and start singin'. I get no crickets with the 91 E0. I typically run the 94 and deal with the crickets.

E10% is harmless? I have seen some gas station with 93 oct E10% with same price
of 91 oct, worh it or nvm?

You will get a minor performance boost from the 93 and yes the 10% is harmless (except some say it is a part of the cricket problem).

Me too. Wasn't worth the trouble of scheduling around the one gas station in my town that carries it. I've long since made my peace with the crickets.

Man, all this whinning about Crickets. Get a set of head phones and fall asleep to this and you'll Never notice the Crickets again... :D

[ame="https://www.youtube.com/watch?v=CXiifFBHj5g"]12 HOURS OF CRICKETS SOUND EFFECTS - YouTube[/ame]

make sure you find the busiest gas station intown for ur gas, car is picky about gas is fresh or not.

I've been running 91 since I bought her and the only time I hear crickets is by the lake, with the window down.

In Atlanta we have no choice other than 93 for premium so that's what I use. It's only 87,89,93 here.

There's always an option to get 93 octane and buy octane booster products to boost it up to 100...

This. Also 94 where I am living now, is cheaper than 91 where I used to live :P

Unless you're tuned for 100, there's no sense buying octane booster.

lol good for trolling

100 is definitely stupid and a good waste of money for the street but not a bad idea for track days.

93 93 93 93 93 93 90% of the time, and your good to go.

It is funny I get inferior fuel mileage with 94 octane compare to 91 octane.

Does the manual specify 91 or 93 for this car? It's 91 in both the S2000 and 240sx.

manual says 91+

Honestly dude 93 isn't worth the 15% premium for daily driving.

has anyone looked at or installed one of the Diesel Conversion kits?

Thinking about doing it this weekend, but its kinda pricey.

You're supposed to pick up a decent amount of torque though, so I'm really leaning towards it.

Man you don't need a kit to run diesel. The FA20 is high-enough compression already that you can just disconnect the spark plugs entirely and run diesel as-is. You shouldn't rev over 3k, though, as your ECU will start to pull timing.

I bet the 94 is about 10% ethanol. Out here our 94 is, and I noticed a slight decrease in gas mileage.

I sometimes mix it up by going 91 or 93 from what ever station is handy (but gets a lot of traffic) that at any given point in time I am probably actually at about 92.5.

I should know better, but I honestly don't know if you're serious or not.

I see a new engine swap thread in our future!


http://www.allpar.com/photos/mopar/c...iesel-2012.jpg

The owner's manual reccomends 93. I only pump 94. 91 if I'm in a crunch.

No no no... Timing doesn't matter because the plugs have been disconnected. Duh.

The 3K limit is because of the VVT and a huge torque bump that will grenade the internals. If you have OFT you're lucky because I heard @Shiv@Openflash is working on a tune to flatten it.

This. That being said, I ran 91 in the car for a year and about 10,000 km up in Thunderbay because that's all they had. The car seems to like 94 a bit better though. Well minus those crickets. Where's my fly swatter?

I'm on a 91 tune, so I go out of my way for shell 91.

However, I'm thinking of going back to a 93 tune, so long as running 91 every now and then in a pinch isn't going to make my motor esplode. It's extra temping since I have a petro-can with 94 about 1.5km from my house. I'm lazy and I like convenience.

A friend of mine has a 350z tuned for 94. His tuner said he can run 91, just don't beat on it too much (tracking, wot for extended periods, red line shifts ect.). Which tuning software are you using?

oh right. duh. my bad.

OFT

You can only get 91 here in Cali.:mad0260: That's what I'm usin' in the SS, so I figure I might as well stick it with it in the FRS. It's kept that L99 engine knock free and purring for 5+ years, gotta be good for the Boxer. I think it was $3.59/gal last fill up.

The owners manual recommends 93 but requires a minimum of 91.

*: If unleaded gasoline with an octane rating of 93 AKI (98 RON) is not available,



unleaded gasoline with an octane rating of 91 AKI (95 RON) may be

used with no detriment to engine durability or driveability.

Yes. I only use the best for my fleet of cars. Fwiw, I can definitely feel a difference in power between 91 and 94 with my buttdyno. Again, you can use 91. But is it optimal? Not really.

I recall a dyno sheet showing both fuels tested. The 91 oct only put down some 140whp where the 93 put down around 160whp.

Gotta pull that timing with the fast-burning stuff. Isn't the DI also retarded for the same reason? (DI novice)