i got a little bit bored this 3 day weekend,
so i have decided to do what my " Prius" friends are doing with their cars. Hypermile.
Basically, they put a lot of air on their Low Rolling Resistance Tires for better mpgs.
most do 45, while i know some who puts 60psi.
Hmm.. so let's test that on a 2013 RX 350 running on regular unleaded 87 octane ( Costco gas) with OEM tires ( Dunlop Grandtek) and 19 inch rims.
every gauge was reset to ZERO
here's my baseline: i do 85% highway and 15 % city driving.
and here's what happened after putting 38psi ( too scared to do 40)
and nearing the end of my commute
and at here's the final
Disclaimer: i don't recommend this practice at all.
Overinflating the tires can give you a lot of mpgs but it can be unsafe
Although, aside from a bumpier ride, i didn't feel any difference in the drive.