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[Bigfella237]

Regardless of the type of oil, what you're saying doesn't make sense.

If the engine hasn't been running for some time, IE. "cold", I agree that the oil drains back into the sump, but that means that the normal "cold" oil level is supposed to be higher than the normal "hot" level, but dipsticks are marked the opposite way around.

 

[tml678]

Regardless of the type of oil,

Regardless of the type of oil? Huh? We're talking engine oil here, not transmission fluid.

Remember - you're the one who posted this:

Like engine oil on a dipstick, tyre pressures change quite a bit with temperature

and then you go and pull a transmission dipstick.......right........

If the engine hasn't been running for some time, IE. "cold", I agree that the oil drains back into the sump, but that means that the normal "cold" oil level is supposed to be higher than the normal "hot" level, but dipsticks are marked the opposite way around.

Engine oil dipsticks aren't marked hot/cold, they are marked min/max or similar. some, like my Magna, just have two indentations for the min/max level. Go and pull the ENGINE OIL dipstick out of your car and post a pic..?

Transmission fluid does work on the hot/cold principal.

 

[greenacc]

If the engine hasn't been running for some time, IE. "cold", I agree that the oil drains back into the sump, but that means that the normal "cold" oil level is supposed to be higher than the normal "hot" level, but dipsticks are marked the opposite way around.

Oil expands when it's hot and that makes the level rise.
Some fluids like transmission fluid expand more than others. Just follow the instructions.

 

[vr304]

Oil expands when it's hot and that makes the level rise.
Some fluids like transmission fluid expand more than others. Just follow the instructions.

Exactly why they have hot and cold readings on the transmission dipstick same with power steering fluid tank as for engine oil the difference isn’t significant enough to warrant it but there will be a slight difference

 

[Fu Manchu]

At what stage do they blowup?

This. This will be fun. Did myth busters do one?

 

[Fu Manchu]

So. How’s the weather?

 

[Fu Manchu]

38-40 psi and done warm after driving.

 

[VS_Pete]

Nobody is mentioning whether their pressures are taken hot or cold?

Like engine oil on a dipstick, tyre pressures change quite a bit with temperature. There's maybe 4 or 5 psi difference (depending on how much air vs how much rubber).

If you actually read the sidewall of any (most?) tyres they will tell you the maximum inflation pressure.

Andrew

VS / VE 40PSI.
Tyres cold

 

[VTS5]

So, what tyre pressures do everyone use for their tyres.

I have 275 19 40 and 245 19 35.

Very simple....

 

[Not_An_Abba_Fan]

The best method to determine the correct pressure for your car and driving is the 4psi rule.

Start cold, set the pressure. 38psi would be a good starting point for that size.. Drive for about an hour at more than 80km/h then check your pressures. If it was correct cold, they should have risen by ~4psi (+/- 0.5psi). If they have risen by more than 4psi then your starting pressure was too low. If they have risen by less than 4psi, your starting pressure was too high. Adjust your cold pressures up or down by 1psi increments until your hot pressure is 4psi higher than your cold pressure.

This method determines the best pressures for your car, your tyres, your load and driving. Just because your neighbour has the same car and size tyre doesn't mean what is right for his car is going to be right for yours.