Starting to Ping!?!
#1
Starting to Ping!?!
ok, my '04 has about 15K miles on it and I've started to notice a pinging when I strain the engine. It usually happens when I accelerate hard up-hill. I always use 89 octane and have changed the oil every 3500 miles. Should I try a couple of tanks of premium before taking it to the dealer?
![Confused](https://g35driver.com/forums/images/smilies/confused.gif)
#4
Originally Posted by G35_4_Me
ok, my '04 has about 15K miles on it and I've started to notice a pinging when I strain the engine. It usually happens when I accelerate hard up-hill. I always use 89 octane and have changed the oil every 3500 miles. Should I try a couple of tanks of premium before taking it to the dealer? ![Confused](https://g35driver.com/forums/images/smilies/confused.gif)
![Confused](https://g35driver.com/forums/images/smilies/confused.gif)
Definately try it before you assume there is a problem. It should only take a tank maybe 2 to get an idea.
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#8
Originally Posted by G35_4_Me
ok, my '04 has about 15K miles on it and I've started to notice a pinging when I strain the engine. It usually happens when I accelerate hard up-hill. I always use 89 octane and have changed the oil every 3500 miles. Should I try a couple of tanks of premium before taking it to the dealer? ![Confused](https://g35driver.com/forums/images/smilies/confused.gif)
![Confused](https://g35driver.com/forums/images/smilies/confused.gif)
C.
#9
#10
If it's pinging at all then the knock sensor isn't doing its job. Take it to the dealer. Apparently there are many cases of rodents eating through the wiring for the knock sensor or something ridiculous like that, based on the material the wiring is made from being particularly tasty.
(OK I re-read that and I SWEAR I'm not insane. Do a google search)
(OK I re-read that and I SWEAR I'm not insane. Do a google search)
Last edited by doogie; 06-17-2005 at 02:12 PM.
#11
Originally Posted by trey.hutcheson
Um, NO. At least for the 04, the owner's manual specifically states that 87 is acceptable, but 89/91 is recommended.
The owner’s manual (attached) says: 87 AKI (Anti-Knock Index) – Research Octane Number 91.
As always, the higher the octane the better… My question is: If you own one of the highest rated performance sedans (in many cases THE highest rated), why would you put sh!tty fuel in it?
#12
Wow, learn somethin' new everyday. Didn't know the difference between AKI and Research Octanes - heck, didn't even know there WERE different octances:
http://www.eric-gorr.com/techarticle...erminology.htm
-Chris
http://www.eric-gorr.com/techarticle...erminology.htm
-Chris
Originally Posted by OCG35
Okay, let’s set the record straight… On the ‘04 sedan (at least mine) the inside filler door says “Premium fuel recommended for maximum performance”.
The owner’s manual (attached) says: 87 AKI (Anti-Knock Index) – Research Octane Number 91.
As always, the higher the octane the better… My question is: If you own one of the highest rated performance sedans (in many cases THE highest rated), why would you put sh!tty fuel in it?
The owner’s manual (attached) says: 87 AKI (Anti-Knock Index) – Research Octane Number 91.
As always, the higher the octane the better… My question is: If you own one of the highest rated performance sedans (in many cases THE highest rated), why would you put sh!tty fuel in it?
#13
Originally Posted by OCG35
Okay, let’s set the record straight… On the ‘04 sedan (at least mine) the inside filler door says “Premium fuel recommended for maximum performance”.
The owner’s manual (attached) says: 87 AKI (Anti-Knock Index) – Research Octane Number 91.
As always, the higher the octane the better… My question is: If you own one of the highest rated performance sedans (in many cases THE highest rated), why would you put sh!tty fuel in it?
The owner’s manual (attached) says: 87 AKI (Anti-Knock Index) – Research Octane Number 91.
As always, the higher the octane the better… My question is: If you own one of the highest rated performance sedans (in many cases THE highest rated), why would you put sh!tty fuel in it?
FYI -
Anti Knock Index or AKI - The octane number you see at the pumps in the US equal to (R+M) /2 . This is the average of two octane numbers; the Research Octane Number (RON) and the Motor Octane Number (MON) .
Octane Number - A measure of the anti-knock characteristics of a given fuel. The octane number you see at the pumps is the average of two octane numbers; the Research Octane Number (RON) and the Motor Octane Number (MON). This number is sometimes referred to as the Anti Knock Index or AKI. Each of these octane numbers is determined by ASTM laboratory tests. Low-speed and low load knock characteristics are determined by the RON test method. The MON method tests high-speed, high load, high temperature situations, in practice these conditions exist during periods of high speed power accelerations, hill climbing, or any period of high power output (sounds like racing to me). Obviously the MON number will be lower, but it's the one racers should concern themselves with.
Anyone explain any difference between these two terms? Looks like the same to me.
#14
#15
Originally Posted by OCG35
Okay, let’s set the record straight… On the ‘04 sedan (at least mine) the inside filler door says “Premium fuel recommended for maximum performance”.
As my wife has stated, we started out with 87. We now use 93 exclusively in both Gs.
Originally Posted by OCG35
My question is: If you own one of the highest rated performance sedans (in many cases THE highest rated), why would you put sh!tty fuel in it?
I have seen the same sentiment many times in other threads on this forum. Statements to the effect that people shouldn't buy an expensive performance vehicle if they plan on using cheaper fuel. I consider statements like these to be the utter height of arrogance. Some people might have purchased the car for other reasons. Others may have purchased the car in one financial state, but may have had to cut back on amenities; in such situations this might include the more expensive gas, regardless of its combustion properties.
I admit I sometimes ask similar questions. Why buy a four-wheel-drive SUV if you never plan on going off-road? Why buy a nice high-end stereo receiver only to cripple it with crappy speakers? Why buy a new high-def TV and connect it to your cable box using cheap composite cables? You know what?
First, It's none of my business. Second, to suppose that I can question someone else's financial decisions is pure folly.
[/RANT]