The 2009 Lexus IS-F's engine produces 371 ft-lbs. @ 5200 rpm.
The 2009 Lexus IS-350's engine produces 277 ft-lbs. @ 4800 rpm.
The 2009 Lexus GS-450H's engine produces 267 ft-lbs. @ 4800 rpm.
The 2009 Lexus LS-460's engine produces 367 ft-lbs. @ 4100 rpm.
The 2009 Lexus ES-350's engine produces 254 ft-lbs. @ 4700 rpm.
The 2009 Lexus GS-350's engine produces 274 ft-lbs. @ 3600 rpm.
The 2009 Lexus LX-570's engine produces 403 ft-lbs. @ 3600 rpm.
The 2009 Lexus LS-600H-L's engine produces 385 ft-lbs. @ 4000 rpm.
Use 91 octane or higher octane rating premium gas for the 2009 Lexus RX350
In 2010 Lexus RX350's started using Timing Chain's in the 3.5 engine, which require no maintenance (unless very high mileage is reached or parts failure). Earlier years <2009 had timing belts. I verified the 2010 model has a timing chain via contacting a local Lexus parts department.
The 2009 Lexus IS-F has a V8 engine.
The 2009 Lexus IS-250 has a V6 engine.