Hello,
I ususally get synthetic oil. Sometimes however, while travelling, I need to top up, and put in a regular oil.
In the past, the mechanic would give me an oil change for free - but it would be regular oil (no synthetic). Other times if synthetic was handy it would go in.
Is there a problem with mixing or switching motor oils? I have a 92 Passat with high mileage.
Thanks,
Tmuld.