Well I increased my tyre pressure this morning to 275 kPa. Almost immediately I was getting 4.7 L/100 km in city driving. I have never understood why car manufactures seem to under-inflate tyres. Don't they know that people would save so much money in petrol if they would just increase the tyre pressure to begin with.?
My tire store guy whom I trust says that automakers recommend low tire pressures for that squishy soft ride that drivers seem to want, and that the tires manufacturers don't disagree because they know that tires wear out faster when under-inflated so they sell more tires. Seems like a reasonable, if unjustifiable, explanation to me. Personally, I run 42/40 psi on the Prius, and 38/38 on my Tacoma.
Despite your user id, most folks on this board have no idea what your numbers represent vs. something they can relate to.
Oh well that is ok. LOL. I just use what I am used to and what is easier for me to understand. :rockon:
Unfortunately that is not a great way to get your point across. I see similar issues with ebonics and those who do not wish to learn correct English. lol
LOL. Here is something that might help. LOL Online conversion of weights and measures, measurement conversion. Just using what 95% of the rest of the world uses. Enjoy.
But--probably 95% of the folks on this forum are from US and don't use the metric system, so your comment was useful for a full 5% of the audience.
IMO you're still running too soft. I'd bump up to at least 300 (easy to see on my gauge) or 310 or max sidewall pressure.
Google makes for a simple unit converter. Search for "275 kPa in psi". An example of a great conversion is "50 mpg in teaspoons per mile"
I had thought about going to 300 kPa, but I am such a creature of comfort that I know for my liking it would make it too rough. I had my tyre pressure at 300 kPa in my Gen II Insight and found it was too harsh for me. So I dropped it down to 275 kPa. I appreciate your suggestion. It is always nice to get helpful information. Thank you.
I think no matter what I do now in my daily life, I will compare it to how many teaspoons per mile I'd get!
And even though the UK is now metric for most things, I only understand PSI in respect of tyre pressures and have never heard of kPA.
If I had "tyres" on my car, I might measure the pressure in kPa, but since I have only "tires" on my car, I measure the pressure in PSI.
Tire in American English or Tyre in proper English And in the UK, where we speak Queen's English, it's PSI not kPa with attempts to move to Bar. Why do we have to have so many different measurements for the same thing!
Beats me, especially since 1 Pascal = 145.04×10−6 PSI. Oh, yeah. It is very important to be measuring tire pressure in units that are that fine.:huh:
DarrenG, you are correct about the spellings. My Paternal Grandmother, Grandfather and Father are British and insisted that my sister and I learned as my Grandmother calls it "Proper English". Though I am American, to this day I still use proper English. As I said in earlier posts I use what I am used to. As for kPa (metric) that is pressure in kiloPascals. The Bar is an antiquated measure for pressure was more commonly used for atmospheric pressure rather than tyre pressure. :rockon:
As long as we're discussing conversions: There's a Chevy Cruze ad in Friday's Vancouver Province, proclaiming it gets: "50 mpg HWY" No explanation that the calculation is very likely miles per imperial gallon, which is 5/4th's of a US gallon (5 quarts, 160 oz per gallon, vs the US 4 quart, 128 oz). Now, gas has been sold in litres in Canada for about 30~40 years now, but for some reason Candian car dealers still cherish the imperial gallon...
No thanks. I'll continue to use the system that the majority of people in my country and this forum use. It's better than coming across like a weirdo who is fascinated with being different.
