Which Engine oil should I use on Toyota Fielder Hybird 2014, 130000 KM ODO. I have been using 0w-20 Synthetic past 5 years; recently I have replace 0w-20 with SN/CF 10w-30 for last two engine oil changes- 12000 KM.
I feel engine is dragging some more power, fuel average has also reduced. Will it be harmful for engine if I go back to OW-20 engine oil.?
