Hi forum readers, my first post here. We have recently purchased a 2000 Rav4.2. It has done 120k km and has a complete service history from Toyota dealers and independants. One thing I find odd, the oil specification from Toyota seems to be 5w30, however the owners manual specifies 10w30! The internet confirms that 5w30 is pretty common and 0w20 is an option for better fuel economy, on the later cars at least. I've checked my invoices, the Toyota dealers list "Toyota oil 10w" which I assume is 10w30. Why would they change from what Toyota specifies? Seems odd. As we drive mostly infrequent short trips and overall, cover very low mileage per year, I want to make sure it has maximum cold start protection more than anything else. The trans fluid is also quite dirty and has probably never been changed as per the service recommendations from Toyota. I want to change the fluid, a full flush prefered but Toyota wont do this and its proving hard to find an independant mechanic that will either. They just want to drop the pan and refill which will, without a doubt, leave the trans fluid looking pretty much the same. The Toyota T-IV specification is also not that easy to find and I don't really trust a mechanic to use the right fluid. So I have looked to supply my own. I have found, unless you buy a full or part synthetic there is nothing that meets the T-IV specification. Can anyone suggest a suitable transmission fluid? And also somewhere to service the trans.