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Are you guys all running 89 octane in your pw ? I recently purchased a 2009 w 50k and Ive been running 87 octane and it started with the pinging. I put 89 in this week and it improved some. Just curious. I see the owners manual calls for 89.
 

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I have been running 87 for a few weeks now. Granted, I have only had the truck about 2 months with 5k miles. With gas prices at $4 this week, I have been running 87. I should run the 89, I prefer it, but ya know. I have not heard any pinging or any other noises running it. Hope this helps.
 

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The owners manual recommends mid grade, but it also reads that 87 is OK
If you start getting the engine pinging noise, go with the mid grade.

I have been using mid grade when my tank is close to empty, then 87 octane when my tank is over 1/2, so far i have not had any pinging.
I now have 62,000 miles on my HEMI, just getting broke in
 

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91 in both....MPGs suck no matter what :D silly right foot
 

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I use 89. With 87 I get some pinging. For me it's @$12-$14 more per tank to fill with 89.& the truck seems to run better.
 

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I use 89. With 87 I get some pinging. For me it's @$12-$14 more per tank to fill with 89.& the truck seems to run better.
89 cost ~$0.50/gal more than 87 for you!? That's crazy! 93 doesn't even cost $0.50/gal more than 87 where I live...
 
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