Just want to know weather synthetic engine oil has an expiry...canadiantire has mobil 1 synthetic oil of most type on sale...
additionally wat type of synthetic oil should i use for Lancer GT....5w30 or 10w30

thanx in advance

 

1) Generally Synthetic Oil has been engineered to be durable over time. You hear numbers like 1 year shelf life thrown around, but its likely to be much longer than that. Conventional and Semi Synthetics are likely to break down sooner and loose some of its properties over time, storing temps might also affect these oils over time as well.

2) the 4B11 and 4B12 engines (non turbo) require 5w20 or 0w20 oils for their operation. 5w30 isnt far off. but you should stay within the recommend oem specification.