Quote:
Originally Posted by 911medic
OK.
I'm not sure how the OP's pictures of his dirty intake valves would generate a response like "Also, use better gas, that has [87] written all over it" and have anyone interpret that to be a comment regarding the "lower parts of the engine," but I'll take your word for it.
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http://www.aa1car.com/library/pcv.htm . Bad gas leads to build up in lower parts of the engine. The build up/blow by vapors get recycled via the pvc system leading to more than usual build up on the intake valves. Sorry that I wasn't clear or specific when blurting out information/advice.