No Smoke Two Stroke is truly the first Smokeless 2 cycle oil mix. It is safer on you the user and on our environment because it eliminates exhaust smoke. It burns so clean that there is virtually NO CARBON BUILDUP! Here are some other features. ** Less exhaust port clogging ** Superiour performance with unleaded gas ** Incredible anti-seizure protection ** reduced downtime ** increase engine life ** By the case(6, 6-packs per case) We've been selling this for 11 years and not one complaint