I've advocated RFTs previously having found myself in Germany on a road trip with a 'flat' when I did a spot check at petrol station on a Sunday evening. I'dve been stuffed for the night otherwise. On that occassion I filled the culprit tyre up, reset the RFS and checked pressure for the next few days - all fine.
Skip forwards 3 months to last Sunday evening and I pull onto a layby on the north of Isle of Skye to take a photo and catch something in a rear wheel. I check it out and to my horror see the inside tread of the same culprit tyre down to threads for a good 10 inches down the edge. We are properly in the sticks, I have no phone signal, the rain is starting, my wife is in the car and pregnant......
oh, and I still don't know why something is scraping somewhere. 
So it's a slow drive for about 25 miles and thankfully we reach a petrol station with air - the culpit tyre is 0.8 bar so I raise it to 2.4 to get us back to the hotel 15 miles away and reset the RFS. The scraping also stopped after a few dozen meters after the layby so was probably a stone chip in the wheel picked up there, thankfully that happened to make me take a look.
The next morning we take another slow drive to a petrol station and it's 1.8. NO WARNINGS. I can't source a tyre locally that day and we're due home later for work the next day (300+ miles away) so it's a slowish drive with regular air stops but keeps to around 2.2 - 2.3 no problem. Made it after a very long, slow drive on minor roads with a new tyre ordered and ready for the next morning - nail was deep in the old one. Now thinking regular tyres plus weld and inflation kit next to the battery well would be better - at least you get a visual on the tyre pressure and know not to rely on RFS working.
The only sign of the issue is that my fuel consumption has improved by 20%. I did wonder why I was getting better mpg on the continent but assummed it was either more economical driving on country roads as it's mainly motorway at home, or possible better quality petrol than my local.
I hold my hand up for being an idiot not checking the tyres regularly and assuming the RFS would let me know if they dropped by enough to warrant a top up, but am I being stupid like it is only expected to warn you if it's a rapid drop in pressure, or is it ******???? Surely you're more likely to realise a rapid drop from the cause rather than notice a slow puncture/gradual drop when the warning could draw your attention. Anyone know how this should trigger the telltail light? I'm going to let a load of air out this weekend and see if that triggers it before I press Stratstone on their 12 month used car gaurantee.
Oh, and my drivers wing mirror dropped off this week too (no not a Sunday evening) just after a few miles of a 75 mile motorway stretch to get home. :headbang: Not particularly impressed with BMW at this point though I do thoroughly enjoy the Z ordinarily.
Skip forwards 3 months to last Sunday evening and I pull onto a layby on the north of Isle of Skye to take a photo and catch something in a rear wheel. I check it out and to my horror see the inside tread of the same culprit tyre down to threads for a good 10 inches down the edge. We are properly in the sticks, I have no phone signal, the rain is starting, my wife is in the car and pregnant......
oh, and I still don't know why something is scraping somewhere. So it's a slow drive for about 25 miles and thankfully we reach a petrol station with air - the culpit tyre is 0.8 bar so I raise it to 2.4 to get us back to the hotel 15 miles away and reset the RFS. The scraping also stopped after a few dozen meters after the layby so was probably a stone chip in the wheel picked up there, thankfully that happened to make me take a look.
The next morning we take another slow drive to a petrol station and it's 1.8. NO WARNINGS. I can't source a tyre locally that day and we're due home later for work the next day (300+ miles away) so it's a slowish drive with regular air stops but keeps to around 2.2 - 2.3 no problem. Made it after a very long, slow drive on minor roads with a new tyre ordered and ready for the next morning - nail was deep in the old one. Now thinking regular tyres plus weld and inflation kit next to the battery well would be better - at least you get a visual on the tyre pressure and know not to rely on RFS working.
The only sign of the issue is that my fuel consumption has improved by 20%. I did wonder why I was getting better mpg on the continent but assummed it was either more economical driving on country roads as it's mainly motorway at home, or possible better quality petrol than my local.
I hold my hand up for being an idiot not checking the tyres regularly and assuming the RFS would let me know if they dropped by enough to warrant a top up, but am I being stupid like it is only expected to warn you if it's a rapid drop in pressure, or is it ******???? Surely you're more likely to realise a rapid drop from the cause rather than notice a slow puncture/gradual drop when the warning could draw your attention. Anyone know how this should trigger the telltail light? I'm going to let a load of air out this weekend and see if that triggers it before I press Stratstone on their 12 month used car gaurantee.
Oh, and my drivers wing mirror dropped off this week too (no not a Sunday evening) just after a few miles of a 75 mile motorway stretch to get home. :headbang: Not particularly impressed with BMW at this point though I do thoroughly enjoy the Z ordinarily.
oke: 
Just glad the apparent stone in the wheel prompted me to look before the drive home. Life works in mysterious ways as they say.