Richard, 15W30 Synth sounds great, depending on your mileage, I'd chose Mobil 1. Ask them at the autostore to look up your car and mileage and they can tell you the exact weight oil to use. I use 10W30 in the winter and 15W50 in the summer in my E36.It gets real hot in traffic here in the summertime. Jay '95 M3 Dakar ------------------------------