sammy5001 Posted March 31, 2008 Share Posted March 31, 2008 I've been told that by using cheap gas I will damage my car. So is it true that I should use premium gas for my IS 350? Link to comment Share on other sites More sharing options...
Step Hen Posted March 31, 2008 Share Posted March 31, 2008 Use the octane rating that is recommended by Lexus for your car. Otherwise, the engine will impede it's timing to deal with the earlier detonation of lower rated gasoline and lower engine performance and economy. Link to comment Share on other sites More sharing options...
bartkat Posted March 31, 2008 Share Posted March 31, 2008 Maybe I'll merge this into one of the many other gas threads. It's too late right now. Link to comment Share on other sites More sharing options...
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