Nope, there are no sensors analyzing viscosity. Everything is based on the data provided with TPS, ECT, etc. All Cadillacs do have Oil Life Monitor. My 1991 Seville actually showed the % of "oil life" left.^ Really?!
That's pretty crazy stuff! They should have something that analyzes the oil quality and viscocity or something! lol
Disconnecting battery will not compromise the state of your oil life monitor.I don't know what parameters does the oil sensor uses but I had not changed the oil for 12 months and my battery was dead then I had it recharged the engine just as the car back roared to life, guess what happened ...CHANGE OIL light went off lol
I was surprised in a sense but I had not covered more than 2K miles past 1 year in that time .