Hey guys, I just bought a supply of Synergyn 5w-30 oil. My car is in winter storage right now, I drive it once every two weeks around the block for a few miles on dry sunny days. It won't come out for full daily use until April 2003. Right now I have Castrol 5w-30 oil in it which is about two months old. Should I put in the Synergyn oil right now despite the car being in storage and seeing limited mileage over the next 3 months ?. Or should I put it in once the car comes out of storage ? . Do you think this oil is good to keep in the crankcase for 6 months (taking me to June if I put it in now). I plan on using the Synergyn until end of June ( I put a lot of miles on the car once in full use), and then having it analyzed. In June I will have a supply of Schaeffers oil to use, and I will have it analyzed after its use. Any opinions would be great !. thanks.