Whatever bulk oil the local, independent Volvo repair shop had (I think it was Pennzoil).
Whatever it was, it didn't hurt the 1982 Volvo 240DL any. Was still running strong at 240,000 miles when I "sold" it to a friend in exchange for his knowledge and labor when it came to fixing a fence in the yard. He later sold it for a Honda Accord, but it was still running fine when he sold it.
I miss that car sometimes...
Whatever it was, it didn't hurt the 1982 Volvo 240DL any. Was still running strong at 240,000 miles when I "sold" it to a friend in exchange for his knowledge and labor when it came to fixing a fence in the yard. He later sold it for a Honda Accord, but it was still running fine when he sold it.
I miss that car sometimes...