Using Shell Helix Plus semi-synthetic (now they are printing synthetic on the Bluish-Grey bottle). It is an awesome oil for my Xli, using it for the past two years. Keeps the engine noiseless, cool and clean and good for 6000+ Kms. No issues when changed at 7K. I think this is the best product Shell is selling. I usually buy it from Metro, almost 300 bucks cheaper than the pumps, and they do not sell fake as they buy direct from Shell. So it is orginal.
Beware of oils like Zic as it has become popular, so there is greater possibility of fakes flooding the market. Always buy from a reputable dealer of direct from the agency.