Low fuel in the T8

[Milliner]

Originally Posted by MaDProFF

I must admit still not happy that there is even an AUX fuel Heater on the T8's for UK models, it seems counter productive, especially for pre heat when connected to the power supply, filling the garage up with fumes

I agree with this - seems quite a backward step to burn fuel when it would make sense to draw or divert a little extra electricity to pre-heating the cabin/engine block. The system is apparently in place on the continent.

I assume there are two preheat systems though, to cover all eventualities (whether plugged in or not).

[Philip Fisher]

I crept along the M180 the other month with range down eventually to 10 miles. I tucked in behind a truck and eeked it out to Tesco in Scunthorpe. At the pumps I managed to put 51 litres in my 50 litre tank...... Must have been close!

[nu11eaf]

New model T8 now have a bigger fuel tank, I cant understand why they fitted such a small tank in the first place.

[Director76]

Originally Posted by Milliner

Could be, although I'd have thought the dedicated Aux heater would use a lot less fuel on that single task than the ICE which is also pulling the car along. It would make sense to me to leave the driving to the electric engine where possible

Agree 100% - only don’t think, for some reason, the Volvo engineers have set it up this way.

Could just simply be conflicts in the control system logic, whereby presence of a low fuel flag just overrules a number of other systems including aux heater operation, regardless of the status of lower priority signals like battery is full. Perversely this would probably help you run out of fuel sooner than you otherwise would!

[Director76]

Originally Posted by Milliner

I agree with this - seems quite a backward step to burn fuel when it would make sense to draw or divert a little extra electricity to pre-heating the cabin/engine block. The system is apparently in place on the continent.

I assume there are two preheat systems though, to cover all eventualities (whether plugged in or not).

I think it’s either electric preheat or fuel. In moon on a stick territory I’d like both...electric for plugged in preheating and fuel for remote operation ‘off grid’ so as not to burn all the hybrid battery power just getting warmed up.

Of course the really clever way to have implemented ‘both’ as above would be to configure the air conditioning system to operate when required as an air source heat pump (ie in ‘reverse’).

Trouble is you’d need to plan to have a warm car several hours before you need it, as you won’t get the instant heat an element or fuel heater provides. And as the VOC app timer for preheats no longer works that’s a non starter too!

[Philip Fisher]

Originally Posted by Director76

And as the VOC app timer for preheats no longer works that’s a non starter too!

Is that so? I was wondering as I couldnt delete some timers in the app the other day and they wouldnt update with the car, but I thought it was just me.....

[yeoman]

Originally Posted by nu11eaf

New model T8 now have a bigger fuel tank, I cant understand why they fitted such a small tank in the first place.

How much bigger is it?

[MaDProFF]

Originally Posted by Director76

I think it’s either electric preheat or fuel. In moon on a stick territory I’d like both...electric for plugged in preheating and fuel for remote operation ‘off grid’ so as not to burn all the hybrid battery power just getting warmed up.

Of course the really clever way to have implemented ‘both’ as above would be to configure the air conditioning system to operate when required as an air source heat pump (ie in ‘reverse’).

Trouble is you’d need to plan to have a warm car several hours before you need it, as you won’t get the instant heat an element or fuel heater provides. And as the VOC app timer for preheats no longer works that’s a non starter too!

I do not find this a problem, if I start remote climate from VOC with in 2 minutes / 3 Minutes the inside of my car is pretty warm, intact I find it dam impressive to get it so warm in such a short time.

[Milliner]

I think Director 76 means an electric preheating option, specifically using the air-con to generate heat, would be slow to get up to temp.

[nu11eaf]

Originally Posted by yeoman

How much bigger is it?

I think it is now 70 ltrs