Should I drain the tank ??
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Location: Perth Ontario Canada
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motorcarman (03-16-2018)
#4
What likely happened is they cleared the codes before you bought the car and now, whatever the problem is, is showing up again. Without knowing the code you can't determine what the real problem is. There is an impressive list of things that can fire that light off. Odds are it is part of your smog system.
#5
#6
As far as draining the tank goes, I don't think that's necessary. Burning a single tank of low-octane gas shouldn't do any harm. If you're concerned, you can always add of bottle of octane boost from AutoZone or Walmart. Otherwise just wait until the tank gets lower and top it off with high-test a few times, eventually replacing all the current gas with high-test. (P.S. I - and many others - use mid-range gas with no ill effects. I've been doing so since 2011 and my engine is smooth and powerful, no pings, no knocks.)
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