sorry to be opening an old thread.
So Which one is better Synthetic or Mineral?
when i took my car for the 10K service the SA said that the synthetic oil is good if you have low running (petrol). and even if you miss the service by upto 3k it is ok. If using mineral better change by ~ 7 - 8k. For my old 800, a service person told me to change oil @5k after 50K, so i did that regularly and i got the same FE (28). now with the waggy he said to bring in the car at approx 8k from the oil change. BTW
one doubt, how can we make sure that they are adding Synthetic oil? they could easily cheat us by using mineral and then billing us synthetic?