Premium fuel in the GX470 necessary?

I've got a GX470 on order and should be picking it up next week. I know that Lexus recommends premium gas be used, but I'm wondering if there would be ill effects in using regular octane gas instead?

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Reply to
James P. Clark
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From the Owners Manual: "Octane rating Premium unleaded gasoline with an Octane Rating of 91 (Research Octane Number 96) or higher required for optimum engine performance. However, if such premium type cannot be obtained, you may use unleaded gasoline with an Octane Rating as low as 87 (Research Octane Number 91). Use of unleaded fuel with an octane number or rating lower than stated above will cause persistent heavy knocking. If severe, this will lead to engine damage. If your engine knocks... If you detect heavy knocking even when using the recommended fuel, or if you hear steady knocking while holding a steady speed on level roads, consult your Lexus dealer. However, occasionally, you may notice light knocking for a short time while accelerating or driving up hills. This is normal and there is no need for concern. Gasoline containing detergent additives Lexus recommends the use of gasoline that contains detergent additives to avoid build?up of engine deposits. However, all gasoline sold in the U.S. contains detergent additives to keep clean and/or clean intake systems."

Reply to
hranola2

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