I have 129,000 miles on my 05 ram 1500 (5.7 hemi) and it's been pinging for about the last 25,000 miles. It recently started getting worse especially when i accelerate. I've been using 5-30W instead of the recommended 5-20 oil and 87 instead of 89 octane gas.
I just flushed out my engine and tranny with amsoil and started using 91 octane but it doesn't seem to be helping.
I like to do all my own work but I'm not sure where to start looking. Any advise will be appreciated.