Till Oddo reading 100,341, I was using Zic 5W20 but only once I accidently poured Zic 0W20. And at the end of its life I travelled hilly areas after topping up reduced oil with Kixx 0W20 (poured approx 1 ltr). It then burnt the coil. In next oil change, I switched to Total Quartz 5W30 after engine flush. But, since oil reduction was not stopped, so I switched once again to Valvoline 5W40 at 100,700 oddo. Currently I am at 100, 900. I hope I made myself clear. Any suggestions??