Hi Chris,
Thanks for the quick response. I just bought the car about a month ago. I knew that the cylinder head had been gone through by a local Volvo shop. I use Valvoline 20-50W in it since we usually don't have extremely cold winters here in WV. I also use the Mann filters in all of my Volvos. I'll check for some engine flush at the local auto parts outlet. I've heard from several people on brickboard to use Mobil one synthetic in these cars. I presume it extends the oil change intervals.
Cheers,
Dave
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