When to pick a new pair of Shock Struts, usually 2 kind of parts will be suggested: Oil Hydraulic Shock Absorbers or Gas Shock Absorbers? We will make a brief comparation to help you know the difference.
For OIL HYDRAULIC SHOCK ABSORBERS:
Advantage:①Widespread, large supply in auto-parts store
②Affordable price and durable
③Good experience for urban driving
Disadvantage: ①The oil may boil and lose its properties during long time rough terrain driving
②Bad experience for high speeds
For GAS SHOCK ABSORBERS:
Advantage: ①The suspension works for compression & decompression
②Gas cools the oil and prevents it from foaming
③Suited for racing cars
Disadvantage: ①Few car models supply & higher price
②More rigid and may affect the driving comfort
So, which is better? There is no definite answer because the performance varies in different condition and purpose. For urban driving, i will strongly suggested oil hydraulic shock absorbers.
For our popular Shock Struts listings: Part# B4SH249.It contains for both Front and Rear shock struts. They are great for any 2007-2012 Nissan Sentra Shocks replace.