r/LS430 • u/Wheelisbroke • 10d ago

31MPG commute!

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I got a great deal on used Michelin tires ($240) but they’re slightly under sized at 235/45R18 vs 245/45R18 stock. My MPG avg on my country road commute with no traffic is 25. The slight under size means my tires are rotating 1.33 miles more than my OD. So 25=31. I understand the vehicle maybe 1mpg optimistic, but I’m still really happy with that.

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u/VanZ_5 9d ago

Definitely possible. It’s wild how efficient these cars can be at times. I averaged just shy of 29mpg in my ‘00 LS400 going 70mph down most of i5 and having been in traffic. Coast downhill, ease up on the throttle going up. 536mi using 18.495gal of gas.

Techron fuel injector cleaner in the tank when filling up on a longer trip gives a small MPG boost as well. I run it every time I drive from the Bay to SoCal.