For sure in a car like a TDI ALH where they are monitored by OBD, that spooky thing detects which one is failing going out before it even goes dark.
You also sertainly will not get good results mixing fast and slow plugs.
Interesting pic there. In my China/Prothe vs Bosch Duraterm comparison, I noticed the Chinas heated faster to glowing at the tip, while the Bosch ran a lower temp but heated 2/3 of the plug instead of just the tip.
Beru are supposed to be top notch too.
I'm guessing that is not your experiment?
Last edited by 745 TurboGreasel; 11-09-2013 at 09:37 PM.
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