I use standard Unleaded Shell petrol religiously, never used a system cleaner, worth a try as i would really like more mpg. The car recently (3 months) had a service from Lexus. What type of milliage should i get around town on a full tank?
I get about 410 driving motorway and being very light footed.
I can get about 350 town and heavy footed driving.
an IS200 isnt the best car for town driving and fuel economy. buy a smart car if you want that.