5w-30 versus 10w-30, everything I've ever read says this difference is almost negligible, with some saying that the 5w-30 gives slightly better fuel economy (being slightly thinner).
Once I'm out of free dealer changes, I'll be switching to a synthetic 5w-30. Its minor, but hey, every % helps in the fuel category. Once that happens I'll probably drop my oil change rate down to the 5000mile pace to retain the warranty.
you know, these free oil changes have really discouraged me from going to the dealer.....I went in at 7:30 am one day to find out I'd have to leave the car there for hours, and they didn't want to give me a loaner. I definitely don't wanna spend a whole saturday going there as well, as it is "first come first serve" bs. So, I got my TRD oil filters, and gonna buy some mobil 1 and get it started now. Screw the dealer.
My dealer has 29 minute guarantee. If they are not done in 29 minutes, my next oil change is free. Basically with my Matrix I only paid for every other oil change, leaving me with an average of $10/oil chage. Not too bad if you ask me.
thanks for the info, Zoltiz. Good to know. I might come back to them in a while, but as of now, I'm gonna do the oil changes myself. I don't feel like putting up with their bs and waste my time on something that takes 10 min to do myself. The amount of time spend on waiting for the dealer to change the oil negates any savings in getting the 3 free oil changes. It also turns me off going to the dealer.