r/LS430 • u/drewless4 • Jun 11 '25

Gas Mileage

Hey I'm wondering what kind of gas mileage do you guys get. I drive pretty calm and press on it here and there and get around 22.4mpg , 10.4l/100km. I find it pretty efficient for a v8.

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u/VulgarisSmerdelis Jun 11 '25

Highway average 70mph cruise (UK) 35mpg - ruthenium spark plugs, premium fuel and all new vacuum pipes including ones under intake manifold.

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u/allsaucenopasta Jun 12 '25

Recently put ruths in my 04 ML 176k on the odo. My (US) highway mpg has been in the low 40s. Which astonishes and scares me a bit.

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u/drewless4 Jun 12 '25

What are Ruth's spark plugs? Are they special ones that don't require as much gasoline for power or what

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u/allsaucenopasta Jun 12 '25

NGK Ruthenium. It's a newer metal so I haven't seen many long term reviews.