Engine idle chirping (cricket) noise poll.

[DoomsdayJesus]

Originally Posted by N1rve

I've been fillling up at Costco exclusively, only chirps when it's pass half tank or extremely hot.

At least Costco is dirt cheap top tier gas. I've noticed Arco advertising top tier gas as well recently, although I'd have to see independent verification to believe it.

[strat61caster]

Originally Posted by rinnamon

Does this mean that the ECU isn't quite set up correctly for E10? If people use E90 or whatever (with the OFT tune) and don't get chirps and if people use the stock "tune" with E0 and get no chirps, then simple logic suggests that something in between (e.g. E10) needs its own tune (which could produce quieter results somehow).

What is it about the OFT tune that causes the change? Is the pump flow rate, timing, etc changed?

The noise is derived from the mechanical operation of the fuel pump, no ECU tune will change that.

Originally Posted by DoomsdayJesus

At least Costco is dirt cheap top tier gas. I've noticed Arco advertising top tier gas as well recently, although I'd have to see independent verification to believe it.

I asked in the top tier gas thread and nobody answered me, is top tier gas anything more than a marketing scheme?

[kbye]

2014 FR-S, 11,000 km or 6800 miles, never had crickets and still don't. I have only ever used Esso 91 (Canada).

[BRZnut]

Originally Posted by DoomsdayJesus

At least Costco is dirt cheap top tier gas. I've noticed Arco advertising top tier gas as well recently, although I'd have to see independent verification to believe it.

Do all Costcos sell top tier gas???

[axelo]

I took the time today to listen at my crickets today and noticed the chirp is not as high pitched as i remember...its definitely more subtle, i like the way it sounds anyway...my 2 cents at 29,000 odo
Thanks to everyone

[litemup]

Originally Posted by Luis_GT

I tried E10 for the first time last week cause I was low on gas and was the first thing I found.

Instant crickets after 15K miles... going back to my 93 E0 even if its 5 cents more a liter.

Originally Posted by smg1138

I'm at just over 15k miles and the crickets are still in full force when using E10. As soon as I fill up with E0 though, they completely go away. I've tested this several times and it's always the same.

Originally Posted by tonyfrs86

so im at 30,000 miles about and i still have crickets. they only completley go away when i fill up with ethanol free and i noticed they are way way way more quite when i use lucas upper cylinder lube when i use regular gas.

i am turbo'd and i run 5w-30 in my engine, i dont know if that important to you guys or not.

I seriously wonder if those of us using E0 aren't prolonging some sort of break-in. It does make sense that the resonating component(s) could eventually "detune" themselves over time - some specific area or sharp corner eventually wears in enough that the ringing stops.

[ZZT86]

As I have stated here before, VPower here in Oz has NO ethanol and up until recently (the fuel of choice & nothing but) never had any crickets. As soon as I temporarily switch to a Caltex 98 whatever they call it over here - voila, instant crickets ! A small percentage of E seems to be the catalyst to the noise.

And for the record & during the last 5000kms I have only been using E70-E85 fuel (variation cos of the cold weather otherwise E85) - NO crickets !

[Daedex]

I haven't read through all 100+ pages, but have we found an underlying cause for these crickets?

I just received my "new" BRZ which was pre-owned and has 16k miles on it, and I have a whole harmony of crickets singing to me once the engine is at driving temperatures.

[DoomsdayJesus]

Originally Posted by strat61caster

I asked in the top tier gas thread and nobody answered me, is top tier gas anything more than a marketing scheme?

It's a good thing. Basically they exceed EPA mandated levels of detergents in fuel by a certain amount. It's as dictated by auto manufacturers like BMW, and it prevents carbon fouling and crap like that. It's a legit standard.
http://www.toptiergas.com/

Originally Posted by BRZnut

Do all Costcos sell top tier gas???

Yup. And because of the volume they sell in, you're always getting the freshest gas you can there. Gas has a shelf life without adding a stabilizer, after which you start to get a lot of gums and varnishes that will build up. Ask someone who stores generators or boats for long periods, they'll tell you the same thing. It's a good reason to avoid low-volume gas stations.

[strat61caster]

Originally Posted by DoomsdayJesus

It's a good thing. Basically they exceed EPA mandated levels of detergents in fuel by a certain amount. It's as dictated by auto manufacturers like BMW, and it prevents carbon fouling and crap like that. It's a legit standard.
http://www.toptiergas.com/

Can you link me to something that isn't their marketing material? Just because a couple OEM's put their name on it doesn't make it legit, oil has a fuckton of money to throw around...

Edit: To clarify EPA standards are rather stringent (more stringent than some of our food standards but that's another topic), I have a hard time believing any gas is significantly better or worse especially considering the limited number of refineries supplying each region. A gallon or five of 'miracle X' in a couple thousand gallon tank doesn't exactly make me want to pay an extra $1-3 per tank.

[extrashaky]

Originally Posted by xxBrun0xx

Would be interesting to start a poll of people >10k miles to see who still has crickets.

20,500 here, and the crickets still sing. I have found a local station with 92 octane E0 that gets rid of crickets, but other E0 stations have had no effect. Unfortunately I'm on the road every week, so I have to take what's available when I'm 300 miles from home on empty.

Originally Posted by strat61caster

I asked in the top tier gas thread and nobody answered me, is top tier gas anything more than a marketing scheme?

It's not the gasoline manufacturers that set the standard. It's a group of auto manufacturers. When the EPA standards for detergents in fuel went into effect, they were actually lower than what was on the market. So a bunch of auto makers (BMW, General Motors, Honda, Toyota, Mercedes-Benz, Volkswagen/Audi) got together and created their own standard. All of the major gasoline brands meet or exceed their standard and are thus categorized as top tier gas.

But top tier gas is required to have 10% ethanol. If you get E0 gas, it's not top tier gas, so it doesn't have to have either the ethanol or the detergents the top tier distributors have. That's why I think it's the detergents that are causing the crickets.

Originally Posted by Daedex

I haven't read through all 100+ pages, but have we found an underlying cause for these crickets?

LOL no. Just lots of theories. I have my own, which I think is better than everyone else's, but in the end it's still just a guess.

Originally Posted by DoomsdayJesus

It's a good reason to avoid low-volume gas stations.

That's the thing that bothers me about putting E0 gas in my car. Sure, it might get rid of the crickets, but what else is it doing?

[strat61caster]

Originally Posted by extrashaky

It's not the gasoline manufacturers that set the standard. It's a group of auto manufacturers.

Once again, do you have a link to any independent studies or evidence?

[unsurety]

regarding top tier gas:

http://acurazine.com/forums/showpost...4&postcount=47

[extrashaky]

Originally Posted by strat61caster

Once again, do you have a link to any independent studies or evidence?

Independent studies or evidence of what? The auto manufacturers got together and created a standard and a certification. The fuel companies meet the standard to certify as top tier. Either they're certified or they're not.

I have no idea whether the certification really means their gas is any better, but the fact that it's not the fuel companies certifying themselves tends to lend it a bit more legitimacy. If it were just a marketing scheme, what would the auto manufacturers get out of it? They don't sell fuel.