My car has been running quite well for a while. However recently during
a road trip in Vegas, my engine is pinging when I accelerate. I had a
full tuneup about 10K ago and an oil change about 2K ago. I thought it
was bad gas (I always use 87) and have been filling up with Chevron
lately, but I filled up (from close to an empty tank) at another
station and the pinging isn't gone. Does anyone know what can cause
engine pinging and what can be done?
Thanks