Idling In California Requires A Special Exemption Sticker

Idling In California Requires A Special Exemption Sticker
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However, an engine tends to be at it’s least efficient when idling, as well as producing the greatest amount of oxides of nitrogen (smog). The CARB ruling required that in order to certify diesel trucks for California, automakers had to meet an idle emissions standard of 30 grams of NOx per hour. Continue Reading...