GotGladiator
Well-Known Member
Just 87, daily drives and even when towing. No issues.
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Yeah, "patently false". And "they ping so much*.Patently false. Itās 10.2:1. Up from 9.6:1.
General rule of thumb is 9.3:1 and below for 87. Jeep got this one wrong. Which is why the new 3.6s ping so much.
You just donāt know what youāre talking about.Yeah, "patently false". And "they ping so much*.
A little seriousness please.
These engines barely ping even a little bit if at all.
Ive heard a lot of good and bad about the pentastars and pinging "all the time" is not a common complaint even on this forum full of the most observant people on earth when it comes to jeeps.
Mine runs fine on 87. Every one i know with this engine runs fine on 87.
Maybe some dont. But either way, the only "patently false" thing is saying that all 3.6's ping. Not true.
Most people donāt know what to listen for.I've never had pings in any car..regardless of octane. What brand of fuel are you using?
No, it doesn't. There's no difference in energy content.Probably placebo effect. Test it yourself have someone fill it without you knowing what they put in.
The rule of thumb is always run the lowest you can, as it has more energy per gallon. The additives that raise octane lower the amount of energy in the gas.
My wife's LR4 says to run premium but I tested that on a long road trip. 91 on the way down got 2 mpg worse than 87 on the way back, sure I didn't have all the power the engine could make on on 87 but we were going for efficiency.
Wow, where'd you get that?? That's more bunk.You just donāt know what youāre talking about.
They ping all the time. Most people just donāt know what theyāre listening to.
Then you'll like the quote from an MIT engineer I posted about "premium" fuel.Since day one off the lot, I've run premium 93 or Sunoco Ultra 94 when possible........... MPG always around 22.0.
Engine runs smooth as silk for over 30K miles now.
Thanks, ill file this in my "random internet genius smart guy who knows more than the rest of the world" folder.You just donāt know what youāre talking about.
They ping all the time. Most people just donāt know what theyāre listening to.
Iām a professional mechanic too.Wow, where'd you get that?? That's more bunk.
Ping is the sonic wave resonating in the combustion chamber walls when two flame fronts collide. That ping is the result of DETONATION and is almost always destructive. It blows away the cooler boundary layer from the top of the piston, it damages spark plugs, it breaks things.
They don't always ping. I have no idea where you get that, but as a professional mechanic, I can tell you - they don't - or they'd sure as hell better not.
Detonation is when the fuel SELF-IGNITES. The normal flame, started by the spark plug, progresses across the combustion chamber. As the flame front progresses is shoves the unburned mixture into a corner, so to speak. The pressure and thus heat increase in the unburned fuel until it finally ignites, creating another flame front. When the two collide, you get a sonic boom of sorts, and that makes the cylinder walls ring - the ping sound. It's destructive.
Don't tell me I don't know what to listen for - I'm college and factory trained and worked in the field for years. I've built and repaired engines since I was a teen in the 70s.
I know ping - here's a result -
Then you'll like the quote from an MIT engineer I posted about "premium" fuel.
You just donāt know what youāre taking about. Pretty common.Thanks, ill file this in my "random internet genius smart guy who knows more than the rest of the world" folder.
Maybe your ears ping and its not the engine.
HAHAHAHA - copy and paste. Right. I wrote papers and articles on this topic. The only thing I copied and pasted was what I pasted from MIT - the post you quoted from me is my knowledge on the topic from years of research, and training others. No copy/paste, I typed it from what I know.Iām a professional mechanic too.
They ping. But GREAT copy and paste.
Use 93.