We bought our youngest daughter an 07 S40 with 70000 miles on it. Mileage is around 140000 now and she's about to graduate nursing school and will need reliable tansportation ( not a car payment ) for a few yrs. I've had some service work done at the dealership but they are adamant about not changing the trans fluid ( lifetime fluid ). Will do it if I sign a waiver. Couple of the local shops won't do it either. I think this is nuts, and had no idea really when I bought the car. Anyhow a drain & fill is something I can do & am planning to do it myself this week. JWS3309 is fluid spec'd for this transmission. Question I have is given the mileage should I do 3 D&F's back to back or do one and give it some time in between ? Also saw Maxlife syn at $4.27/qt at walmart. Thoughts ? I'd appreciate any experienced opinions. Thanks