IS 250 AWD V6-2.5L (4GR-FSE) (2006)
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Fuel: Specifications
Fuel Type ................................................................................................................................................................................................ Only UNLEADED
For optimum performance, the use of premium unleaded gasoline with an octane rating of 91 (Research Octane Number 96) or higher is recommended.
However, if such premium type cannot be obtained, you may temporarily use unleaded gasoline with an Octane rating as low as 87 (Research Octane
Number 91).
