Hydraulic Roller Cam 270/278
[email protected] 222/230
[email protected] 560/560 LC 112
At todays prices around here it's about .24 cents differance between regular and premium. Based on 200,000 miles over 20 years at 14 mpg it wouldn't have much impact on the wallet for the differance. But then who knows about gas in 20 years !