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Ecotec spark plug colour?

Viiper

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Got an 03' vy sedan ecotec and dual fuel (not factory)
my spark plugs are on the light grey to white colour (which would indicate it's running too hot and or too lean) my question is running both LPG and unleaded, would this be normal for an ecotec? I know they run on the hotter side.

spark.jpg
spark1.jpg
 

losh1971

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That plug looks pretty good to me. Ecos and Buicks burn pretty clean like yours.
 

lmoengnr

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Nice colour, its fine.
 

immortality

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The ecotec's have a lean cruise function, unless the engine is old and tired plugs come out very clean. Mine come out even cleaner then that other than a red tinge from the fuel I use.
 
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