Just got my '06 S40 back from its 105K miles check at the dealer I bought it from new. I always tell them at the previous checks not to change the oil 'cause that's one of the things I do myself & they always comply. Buuut, this time I forgot to tell them & since they have a new service advisor he didn't know me to check on the oil change. Sooo, even thought it's never had anything in it but Havoline 10-30W, they put in Pennzoil semi=synthetic 10-30W. Iv'e driven it about 75 miles since the change. Should I drain it out & go back to my usual or should I leave the new stuff in there? It's never used/leaked a drop in the past. Thanks for your opinion.

Cal