IS - 3rd Gen (2014-present) Discussion about the 2014+ model IS models

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Old 12-03-15, 05:24 PM
  #31  
kinglexus99
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Old 12-03-15, 05:48 PM
  #32  
Rebirthing
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Originally Posted by nixx621
My 350 is a lease and I still only use 91 because that's what's recommended by the company that manufactures the car. It's like what...maybe an extra 3 bucks each fill up? If you can't handle that maybe you're driving the wrong kind of car to begin with.
^ Exactly that
Old 05-04-16, 06:52 AM
  #33  
donstello
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I wonder if people who are using 87, will accelerate the process of carbon buildup on the valves, a known issue w non-port injected engines, particularly w competition engine forms Audi or bmw. The 350 had port injection and I believe 200t does as well. I don't think the IS300 or 250 has it?
Old 05-04-16, 07:07 AM
  #34  
davyjordi
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Originally Posted by donstello
I wonder if people who are using 87, will accelerate the process of carbon buildup on the valves, a known issue w non-port injected engines, particularly w competition engine forms Audi or bmw. The 350 had port injection and I believe 200t does as well. I don't think the IS300 or 250 has it?
the is300 uses the same engine as the 350, it's just detuned. the 250 is the engine that is prone to carbon buildup, although a major engine revision in 2010 largely slowed the process.
Old 05-04-16, 08:55 AM
  #35  
MWIS350
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Originally Posted by davyjordi
the is300 uses the same engine as the 350, it's just detuned. the 250 is the engine that is prone to carbon buildup, although a major engine revision in 2010 largely slowed the process.
I wonder if you can tune IS300 to 306 HP?
Old 05-04-16, 08:57 AM
  #36  
MWIS350
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Originally Posted by donstello
I wonder if people who are using 87, will accelerate the process of carbon buildup on the valves, a known issue w non-port injected engines, particularly w competition engine forms Audi or bmw. The 350 had port injection and I believe 200t does as well. I don't think the IS300 or 250 has it?
All direct fuel injector like IS250, BMW, Audi have carbon build up. But not IS350/ISF because it have direct & port fuel injector.
Old 05-04-16, 10:22 AM
  #37  
evident
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Originally Posted by MWIS350
I wonder if you can tune IS300 to 306 HP?
no one's done it yet and i wouldn't count on it.
Old 05-04-16, 05:32 PM
  #38  
My0gr81
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Originally Posted by evident
no one's done it yet and i wouldn't count on it.
There's a vendor on this forum that claims to have a tune for the 3IS so he could tune it to extend the rev limiter and change A/F ratio to match a tuned up 350. But they want $995 for it. Look up TTFS.
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