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That's why Toyota is king of quality and reliability. Germans and American can't even stand 25% of this mileage. Welcome back Nutbolt after long absence.

i don't really like to copy and paste stuff, but sometimes there is no simpler way: "Briefly, there are two types of "synthetic" oils on the market. Group IV oils consist of molecules that are synthesized from simpler chemical compounds. This lets the chemical engineers "tune" the characteristics of a lubricant to exact specifications. These oils flow more freely at extreme low temperatures and don't break down at very high temperatures. As a side benefit, they generally can be specified one or two grades lighter than a mineral oil, which consumes less energy as friction inside the engine and saves fuel." For more please read here: http://www.popularmechanics.com/cars/how-to/a2316/4232672/ If you still want to read more then go through this PDF: Oils produced by synthesis (chemical reaction) rather than by extraction or refinement. Many (but not all) synthetic oils offer immense advantages in terms of high temperature stability and low temperature fluidity, but are more costly than mineral oils. Major advantage of all synthetic oils is their chemical uniformity. 70% of synthetics contain Polyalphaolefin. [note: Polyalphaolefin is a chemical ] Synthetic Oil is entirely produced by a chemical process. Like H20 is a chemical compound, normally know as water and NaCl is a chemical compound commonly know as Table Salt or simply salt. We have a chemical compound which we call Synthetic Oil. Produced and fine Tuned by Chemical Engineers. For more read this link's content: http://www.rsareliability.com/Report on Synthetic Oil.pdf The comments that i leave here are not for winning an argument (take it or leave it), you could have more knowledge than me on a subject or vice versa. I come here to learn and not to fight. Hope that the above mentioned helps answer a few questions and concerns. Peace out buddy.

AC gas is leaking definitely as it last for 3 months and deplete slowly. Guy who refill, need to do the complete leak test and repair the leaking hose or dying compressor. Which car you drive? which year model? Do you have service history? When was last service done? then we can help you more better.

Just goes to show that regular servicing really does work.

1 Million Miles = 1.6 Million Kms in 9 Years 177,777 Kms per year = 487 Kms daily. That's really a lot to push any vehicle, I haven't seen any other car doing this much before. Good job Toyota.