Using a proper engine oil for our vehicle is an important part of good maintenance. And owner's manual always states which oil is best for our vehicles to drive under normal weather and driving condition. My Nissan Xterra which is 2009 model with 250K km on speedometer had been regularly serviced at agency using 20W 50 engine oil (recommended in owners manual) at every 5000km by the previous owner.
Now the time has come to change the oil for first time since i bought it. Few Xterra owners from - - -club recommend 5W 30 engine oil (10000km) which is also recommended in owners manual. Since these two grades 5W 30 & 20W 50 are different it is important for me to determine which oil is best for my vehicle. By my little search in internet, i understood that 5W 30 oil is good for modern vehicles and this spec oil is lighter which circulate through out the engine faster than dense grade oil like 20W 50. Also recommend for high millage vehicle
Is it required to change to 5W 30 from 20W 50 for better performance for my high millage engine
And also i would like to know that the switching the oil grade will not damage the engine parts
Owner's Manual - Page attached for reference