allans123

Then why does my dealer insist I come in ever 3,000 miles, and even sets my service indicator for that?? You're dealer wants to make money. If you're an "average" driver, mostly highway miles, changing the oil every 5k miles is just fine. Save your money. By the way, don't by the marketing bull about using premium gas either. USA Today, engineering professors at UC Davis, a scientist at Lawrence Livermore National Laboratory, Wall Street Journal and others say premium gas a waste of money, unless you need genuine high performance, and Lexus' are not genuine high performance vehicles. Even then the difference is insignificant to today's engines. All "91 octane" means is that the fuel burns faster than 87 Octane, sometimes not desirable like when driving at high altitudes (1 mile or more). Todays cars cannot tell the difference between 87 or 91 octane. I've been using 87 octane from Costco or Rotten Robbie or USA Gasoline since I bought my IS350 brand new and there's nothing wrong with the way it runs. Don't believe me? Have family or friends do a blind test by having them put gas in your car multiple times (to eliminate guessing) and then you drive it trying to guess which fuel.