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hi, i had the car at the volvo dealer today for an alignment and an oil change. i brought 6 quarts of fully synthetic, which i was using for the last 25k miles already. i told them about it and that the oil is in the trunk, as usual. after the car was done and we were about to leave i put something in the trunk and what do i see - all the oil, untouched. i asked the service guy what happened, he said he forgot to write it down and tell the mechanics about it
so now i have regular oil in it.
since we had to go to an important appointment we didn't have time to have them change it again.
so here is my question: should i leave the regular oil in there until the next change or take it out and put the fully synthetic one in?
we did about 150 miles since then.
btw, we have a 2005 s60t5 with about 77k miles on it.
thanks
fritz

since we had to go to an important appointment we didn't have time to have them change it again.
so here is my question: should i leave the regular oil in there until the next change or take it out and put the fully synthetic one in?
we did about 150 miles since then.
btw, we have a 2005 s60t5 with about 77k miles on it.
thanks
fritz