95bat

I use Costco all the time and never an issue. Costco is a Top Tier fuel for what it's worth. I use Shell when I won't be at Costco ~10 miles away and no chirping with that either.

the manual does say even with 91 the engine might have some minor detonation and its normal. I wonder ifCostco 93 octane still chirps.

wthrman2

^ ditto, use Costco fuel since 2014 on all my cars and never had an issue....

PSGT4

Question: What do you mean by “chirp”? In my experience, pre-ignition sounds more like pebbles in a can rattling around.

KennyFSU

The HPFP/DI injectors are very loud but that's normal (same thing happened in my Mazdaspeed3). You can switch brands if you want but it won't affect much other than sound.

ICEforever

What's a chirp? I know tweet and caw tho...

DLPTony

There’s a few vids on the FB page, definitely sounds like a few birds huddled together. One member had her fuel pump replaced, if I remember correctly, and no chirping so far. (She also uses mid grade gas.) 😳

Anyway…21K miles, I only use BP/Shell, and no chirping. It’s just the luck of the draw either way I suppose. I will say though…wherever you go…put the top grade in your 500. Goodness.

Bechtold

I use QT gas or Costco gas both of which are top tier. So other than going out of town and not having access to one of these All my cars get gas at those two places. I have had zero issues with Costco and my extended family would say the same on their cars also.

macmaster

I use Costco gas all the time and don't have the chirp people are talking about. I also stuff a few $1.50 hot dogs down the gas tank for good measure.

DLPTony

BWAHAHAHA! At that price, you can do whatever you want with them.

wthrman2

I am not sure I wanna know where he stuff his weiner but whatever. (I told you I'd be back - LOL)

DLPTony

::snickering:: In full force! 😂😂

Benibiker1558

At the end of a Mini Cooper S test drive one time, I heard chirping coming from the front of the car although the engine was off. Turns out I hit a pigeon and it went in one of the brake scoops on bottom front of the bumper. I was able to pull the pigeon out and it flew away with a big smile on its face. Needless to say, it was one lucky pigeon, and I fixed the chirping sound coming from the engine bay .

PSGT4

You guys are brutal - love it 😂

Oppolock

My car has a strange high-pitch whirring sound when engine is in low RPM - around 7-800 RPM. I took a video here: - might need to use headphone to hear it as my iphone doesn't have the best microphone.

I thought it was DI fuel injectors initially but it goes away when engine is above 800RPM - sounds like part of the rotating assembly?

Dealer couldn't figure out what was wrong, so just want to see if anyone else has experienced it here.

Appreciated!

LH1

I can definitely hear it. Alex (arentz) and others have posted about this "chirp" noise. It seems to be a normal noise and nothing to worry about.



Here's vpar23's thread on the same issue. The one arentz started may be one page back but there's good info in both.