Correct, but if something mechanical was damaged and the dealer is aware of the ECU being altered they can void your warranty. I hope your IS300 tune is reversable.

 

It would be extremely easy for a claim to be denied due to altering the parameters of the engine operation. Anything and everything drivetrain-related could be easily blamed on increased boost. The engine tuning is a highly sensitive thing. 99% of the people here should just leave that alone, it's for advanced users only who can afford a $15,000 engine replacement.

 

Believe me, I am well familiar with tuning my cars and having warranty work performed that is completely unrelated, my corvette has a track tested CoW tune in it, with headers and full exhaust and had a major auto tranny issue - requiring the rip out and rebuild of the *** end. Then again I never bought a 4 cylinder.

 

 

 

There's no need to use 93 octane in these cars. 91 is the recommended fuel.

 

I believe the 91 vs 93 ratings are a regional thing. Does anybody have a choice between those two
levels at one pump? Regular 87, Midgrade 89 and Premium...one of those two depending on where
you are?

 

Gas millage on the 200T suck big time. If I knew it was that bad, I would of got the 350 instead.
Bad as compare to 1 or 2 mpg better than my big *** Sienna. The Sienna I average 19-20 and I drive both car the same way.

 

After my break in period (~1400 miles) my MPG has gone up to about 25mpg, and thats with sitting in traffic for majority of my commute to work(at least one way)