My mother in law came to visit us this weekend, and on the trip the oil light came on in her Toyota Sequoia.

When I checked her oil, it only seemed to be a half quart low, which doesn't make much sense to me - I would think it'd need to be more than a quart low to trigger a warn.

Then it occurred that perhaps foreign dipsticks measure different from American. The stick has two dots on it, and the oil level is halfway between the dots.

I need to know if that means she's low a half quart, or if that's half her oil (more likely to trigger a warn).

well right wouldnt be a good reason for light to be on and really no different from any car is a full mark and a low add mark

well right wouldnt be a good reason for light to be on and really no different from any car is a full mark and a low add mark

She is a half quart low some sensors are set this way so you will not run it low.