I just picked up a few litres of Mobil 1 0W20 for my Honda Civic Hybrid at Canadian Tire. When I got home I noticed that they were SL not SM. I called the store and was told that they can only get it in SL right now. What's up with that? Is the SL version any worse or better than the SM? Does this mean that these are still group 4/5 instead of three?