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Originally Posted by brtundra
Thanks tundrakc,
The reason I knew to try higher octane was I also have a Ford F-150 with 150,000 miles that has done it since day 1. The dealer just told me the ford was a "pinger" engine. Nothing could be done except run higher octane. So I did run highest octane and it still pinges, but I have had no problem whatsoever with the ford, except it pings. So I just got used to it.
Now this Toyota also does it so I am kinda ticked. I never tried the mid grade though, I never thought mid-grade would do anything? But I'll try it. Let me know how yours works out. I really don't thing pinging hurts the engine, just affects the performance.
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I had a 4'runner for 14 years - it pinged from about the first month to the month I traded it in with 170,000 miles on it ... Premium, mid grade, low grade - pinged with 'em all. Sometimes it seemed worse than others but never ever could figure out what made it worse / better - other than the heat - always seemed way worse on hotter days ....
Then again - never had a single engine problem in 170k miles either ...
Now I hear a very little ping from my new 2005 Tundra as well. A lot less than the old 4'runner - but it's still there ... Guess it's just a Toyota engine kind of thing ... I had a Corolla with a little 4 banger that pinged as well ....
I'll try the mid-grade on my Tundra too - but I'm not optimistic ...