I've been reading the posts on this forum for a couple of days and I've a few questions. Firstly, my vehicle is a '93 Mazda 626 with 170,000Kms. V6 and auto. I'm located in Calgary, AB, Canada where we can see 35'C in the summer and -40' in the winter. Motor doesn't seem to burn any oil and I don't have any oil/tranny leaks to speak of. I just put about $1,000 worth or suspension/brake parts on and now want to take care of the motor/tranny. Car is spec'd for 5w30 oil and Dexron III ATF. I just ran about half a can of Seafoam through the PCV vacuum line, added about a quarter can to a low gas tank and the rest into the oil. I've also added about a quarter can of Seafoam ATF to my tranny. I'm planning to have the tranny and power steering flushed as well as an oil change. I'm wanting to go with synthetic. I'm also considering a moly oil additive to help reduce friction and "smooth" out any defects in the cylinders. Having said that, what would one suggest for a motor oil (was thinking 0w20)? Transmission fluid? Oil filter? Any suggestions for additives and "drive time" before getting these services done? My biggest problem is that many of the additives/cleaners I see on this forum I can't find locally. I'd love to try Auto-RX, but after adding shipping and the wait time for delivery,I'm not so inclined. Haven't seen any MMO around, but I haven't really been looking. I'm also confused as I'm hearing that this goes in the oil and the gas. Most of my auto shopping is done at Auto Value, PartSource or Crappy Tire. From what I see, Mobil1 Synth ATF seems to be a good choice, but how can I know that the shop will use it if I ask for it? What if they don't have it... should I go elsewhere, or substitute? Basically at the mercy of what the service shops and parts places have in stock.