Does it really need to change the egine oil after a long storage (5 months)?
thx

 

Jeez man, where did you learn how to type? Do you Speak Canada or what?

Yes, you should change the oil after sitting for a long time as there can be some condensation buildup in the oil. Also I heard that old oil can turn acidic after a while. Not sure if the acidic thing is true or not but anyways, oil is cheap, its the lifeblood of the engine. Just do it...

Good Luck

 

Actually, you are much better off changing the oil before storing for a long period of time.