Guys,
I had a query regarding oil so thought of consulting the experts.
I used to put Caltex Havoline Formula in my santro previously which i guess is NON-synthetic oil.
Then in the last 2 oil changes, i used the Shell Helix Blue One (Not the black one).
This time around i have used Yellow Shell Helix. Now i was just having a look today the blue one which i used earlier and it was written SYNTHETIC Motor Oil on it which was shocking to me as i thought only Shell Helix ULTRA was synthetic.
Now, i wanted to ask if i have made a blunder by using Non-synthetic oil this time i-e Yellow Shell Helix without flushing with chemical the synthetic oil i-e the Blue Shell Helix OR is it ok to just drain the previous Blue one and add yellow like i did this time ??
Waiting for ur valuable suggestion.