Date registered: Jan 2006
Vehicle: 73 280SE 4.5, 71 300SEL, 03 BMW Z4, 72 Fiat 850, 80 Triumph TR7, 85 Porsche 911
Location: DC Area
Mentioned: 1 Post(s)
Quoted: 95 Post(s)
When I bought my 108, I did an oil change and replaced the stuff with all synthetic. The old beast leaked oil all over my garage, leading me to panic over the piece of crap I bought. After some research, I found that the molecule for synthetics is smaller than conventional oil, allowing it to get by normally worn seals. I drained the stuff, put back the 10W-30 conventional, and had no more issues.
Whether this will be an issue with you or not will be a mystery, but for my $.02, I'd use the stuff you were given, and be prepared to replace it if it starts to leak out.