yup,i had castrol syntrax in my box, just changed it,done 11k,and used valvoline dualblend synthetic blend,crunches from 5th to 4th now ASWELL AS FROM 1ST TO 2ND,it did the 1st to 2nd so thats not new but no wi have 2 gear crunches,back to castrol syntrax/driveline its called now.