Yeah DIY works great for me. Got the topsider for my first one in 2010, and each time I use it the cost per change goes down (paid 36 for the topsider done 3 changes already). I use advance auto sale price of mobil1 5qt/free mobil1 filter for $29.95, I bought 10 sets of this sale for more than 6 oil changes with filters. The next oil change will cut the topsider cost to @ 9 dollers per change and so on and so forth. If you got mobil1 0W40 and a good filter for $55, you did good. Mine with a DIY without the topsider cost factored was under 49 bucks. Knowing the costs for the oils and filters will only go up, I am good for another 5 years changes (I don't drive it enough to warrant more than once a year oil changes).