Hey guys, so yesterday I bought an '84 Volvo 240 Diesel. It's got a little over 300K on the chassis and has a newer engine block and rebuilt head and injection pump installed. The previous owner was running Rotella synthetic 5w-40 and changed the oil and filter "regularly" (he didn't say exactly what mileage his OCI was). The motor burns oil and has a slow leak somewhere. Should I stick with the synthetic? How about this weight? Thanks.
For those interested, here's a pic of the car right after I bought it:
For those interested, here's a pic of the car right after I bought it: