2000 Mazda Protege (1.6 liter), manual transmission. 80,800 miles. Light to moderate pinging, but this only happens when outside temp is 60 degrees F or warmer, and only when accelerating moderate to hard or going up steep hills. If I use 93 octane gas, pinging stops, but I shouldn't have to buy premium just to make it stop. I have been very dilegent to replace air filter & spark plugs (with NKG plugs - which are OEM for Protege).
Also, in cold winter start ups, I get lifter noise for about 10-20 seconds, than it goes away (I am using correct viscosity oil). When using oil pan warmer overnight, no lifter noise.
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Sunday, March 12th, 2006 AT 9:38 AM