To expand a bit on the feul shortage Peter experienced between Nvo. Laredo and Monterrey.
It is clear that this is yet another outcome of trying to cover the maximum distance from the border in the fastest time which means that he stayed on the TOLL MEX 85D and so missed the various easy Pemex locations.
Mex 85 in the first part south of the border is a free and fast 4 laner but then becomes a toll road bypassing all the towns , even outliers of Monterrey with fuel available .
If you split off and follow the old LIBRE highway you will find Pemex in the towns of Vallecillo and Sabinas Hidalgo and several other spots which will give any bike plenty of fuel range without needing to carry your own bottle supply . Ever.
Note also that the bypass really does pass by at a considerable distance and at the exits there are no service clusters of food , fuel and lodging as you might find in the USA . So needing to get off the TOLL 85 means you will be heading back as far as the LIBRE 85 and wasting more time than if you had hied to the LIBRE from its beginning turn off and followed that road south.
This same scenario often applies to many toll roads to distant places in Mexico so always fill your tank before getting onto a toll road if that is your idea of saving time . As a routine always fill your tank at first opportunity in the morning and whenever you pass the half full point.
It is nice to have 500km tank( KLR😃) but never push the limits so that you need to switch to reserve

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http://advrider.com/index.php?thread....207964/page-5 then scroll down to post #93