I own alot of small 2.7 liter to 15 liter diesel engines . I normally do not go for extra's but i am a firm supporter for lucas. I started mainly because i help a friend on his race cars . He allways use lucas @20% i started using it on my big tractor . It has only one job pull the big air drill pretty much 90-100% engine load 12hr to 40hrs at a time. Using same oil same load ect. Before lucas the last 60 hrs of an oil change i would easly burn up at least a gallon a day of reg oil. Once i started using lucas i would only have to add maybe 1gallon of oil between oil changes.to me the biggest thing it helps with dry starts definitly makes it more sticky... I use it on every thing now even the gaser engines ...i am still firm beliver that most products are snake oil. I definitely am a lucas oil fan