namesray
Platinum Member
i use power service with cetain boost. never had any problems gelling and been using it for 6 years here in northern pa. it says it won't void manufactures warrenty when used as directed, so i put confidence in that. it also cleans injectors and lubricates fuel pump and such. since ultra low sulfer diesel came out (both on road and off road) i have been thinking of using the power service additive year round to help with lubrication in fuel pump/system.