Petrol/Gas B58 Overheat at Highway (Motorway) Speed

[Eric]

Observe the same for the (displayed...) water temp.
What does your engine oil temp do when towing heavily (long steep inclines) in hot weather conditions? Mine quickly exceeds 130°C if I don't cut back.
I strongly doubt this was the case when the vehicle was new, but cannot prove it.
I asked for other's experience on several occasions here, but obviously there's no similar experience...

Ah, to be honest I don't think I've had the engine temperature screen on when heavy towing on an incline ( the reason being when towing a big load of horse hay the wife is usually with me and plays about with the audio screen annoying me with her taste in music [ word used loosely)but will see next time I tow. When I have had the temperature screen on the engine has never been above 101°C

 

[TD5-90]

Ah, to be honest I don't think I've had the engine temperature screen on when heavy towing on an incline ( the reason being when towing a big load of horse hay the wife is usually with me and plays about with the audio screen annoying me with her taste in music [ word used loosely)

but will see next time I tow. When I have had the temperature screen on the engine has never been above 101°C

Ok, thanks! Maybe winter time on the northern hemisphere isn't the right time to carry out temperature testing...

 

[MrMike]

Observe the same for the (displayed...) water temp.
What does your engine oil temp do when towing heavily (long steep inclines) in hot weather conditions? Mine quickly exceeds 130°C if I don't cut back.
I strongly doubt this was the case when the vehicle was new, but cannot prove it.
I asked for other's experience on several occasions here, but obviously there's no similar experience...

What viscosity oil are you using? 0-w30 at 130deg is at its limit in regard to lubrication from what I have read, there are a few instances in Australia where this viscosity has caused engine damage.

 

[NQ94]

What viscosity oil are you using? 0-w30 at 130deg is at its limit in regard to lubrication from what I have read, there are a few instances in Australia where this viscosity has caused engine damage.

The HTHS high temperature high shear is a 150C test for modern oils. The life of the oil would be reduced and classed as servere duty working at near those temperatures. The 0W 30 oil viscosity has not caused the engine damage its likely the oil has not been changed at earlier intervals because of servere duty cycles and the engine oil has run to full service distance with excessive oxidisation.

 

[MrMike]

The HTHS high temperature high shear is a 150C test for modern oils. The life of the oil would be reduced and classed as servere duty working at near those temperatures. The 0W 30 oil viscosity has not caused the engine damage its likely the oil has not been changed at earlier intervals because of servere duty cycles and the engine oil has run to full service distance with excessive oxidisation.

So you're suggesting (as I do) more frequent oil changes if towing to reduce the oil from degrading?
This is an issue for those in that situation as most adhere to the manufacturers recommended internals

 

[NQ94]

So you're suggesting (as I do) more frequent oil changes if towing to reduce the oil from degrading?
This is an issue for those in that situation as most adhere to the manufacturers recommended internals

Absolutely change oil at shorter intervals with high amounts of heavy towing. Heavy towing especially at high ambient temperatures has higher fuel use and is classed as severe duty operation. Same should be done with the transmission if towing a lot. The oil has to work harder because of higher continuous cylinder pressures and temperatures for longer times (duty cycle). Engine oil isn't just a lubricant it's a coolant and a waste control fluid.
In heavy duty applications it's becoming more common to base engine oil changes on total fuel burnt to determine service intervals.

 

[MrMike]

Absolutely change oil at shorter intervals with high amounts of heavy towing. Heavy towing especially at high ambient temperatures has higher fuel use and is classed as severe duty operation. Same should be done with the transmission if towing a lot. The oil has to work harder because of higher continuous cylinder pressures and temperatures for longer times (duty cycle). Engine oil isn't just a lubricant it's a coolant and a waste control fluid.
In heavy duty applications it's becoming more common to base engine oil changes on total fuel burnt to determine service intervals.

I changed my oil from 0-W30 to 5-W30, assuming this would help?