Oil change - will this cause issues?

[slappy]

I remember when a woman ( oops person ) came into a shop and asked for some "710" whats grade is that love? " 710 for the engine", the OIL cap was upside down :lol

But did she want 710 semi synthetic or fully synthetic and how often was she changing the oil?


She probably used to buy it from here http://www.silkoleneoil.com/store/index.php?