jjf - thanks for the oil info. Seems to me that if one is going to extended change intervals with synth, regularly scheduled filter changes might address the issue, no?
Quote:
Originally Posted by puddleglum
this thread was about what guages to use in winter. Most new cars with heated O2 sensors will drop into closed loop very quickly, long before the engine is warm
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Quote:
Originally Posted by jfitzpat
My point was that it is better to directly monitor the ECU's decision, rather than inferring it
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I can confirm that the SG reports loop status directly from the ECU; it's not inferred from other sensor readings.
And I agree, puddleglum: some cars go to closed loop really quickly, even in sub-sub-zero
conditions. My Firefly does; but others have reported longer transition times.
(FYI, I don't generally watch the LP (loop) indicator in winter. I do sometimes monitor it when pulsing at high load to prevent going into fuel enrichment).