Originally Posted By: Volv04Life
I know that oil life monitors work by using calculations. Does using synthetic change the calculations or does it still tell you to change it at the same interval if you were using dino?
If it's purely an algorithm (math) based oil life monitor, then it has no way of knowing what kind of oil (mineral or synthetic) you just put in the crank case, hence it'll give you the same results, regardless which oil you use.
With that said, most mfgs calibrate their oil life monitors assuming that you'll use a specific type of oil, such as Dexos1, LL-01, etc. This in a way will dictate the quality of the oil to be used to base the calculations on.