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Note: This question not related to Engine Oil selection for an ambient temperature. It's related to the service life of same oil in different ambient temperatures. Let's assume below two hypothetical conditions in two countries A & B. If we took oil samples from each vehicle after same period of time with same millage (lets assume after three months at 5,000 km usage), Sample A - Country A Sample B - Country B Which sample would be more deteriorated?

Hi all, My car is toyota vios 2007 and has 1.5 l 1NZ engine. Recently I was driving a long trip and suddenly heat bulb started to blink. So I stopped the car and checked. Coolant level is fine and the fan is working. So after a while when I start the car bulb is off. So I plugged a bluetooth obd reader and observed the coolant temperature while driving. It shows around 94c - 100c and blub never started to blink. Is this temperature is normal? What is the temp level that blinks the bulb? Can that problem is a senser problem? Can anyone help.

Hi All. I’m having EK3 1996 which I bought recently. When going on cold whether (specially in night driving in hill country), I have noticed that the Engine temperature becomes very low. (Near to the bottom). As I read from the internet, similar issue can be occurred by a faulty thermostat or not having a thermostat at all. Can you please comments whether the thermostat could be the problem? If so, how much will it cost to install a new Thermostat valve? Thanks Ruwan