Here's the route I took a few years ago with mileage, fuel and toil costs.
This is the route that I have taken a couple of times.
Euro Tunnel to Condado
12:30 Arrive, take A16 to Boulogne
12:50 A16, Take ticket,
13:25 Abbevile Toll €7.30 Take A28 to Rouen
14:38 At Rouen continue on A28 to La Mans then Tours Toll €26
Full up car €53.11
At tours take A10 Poitiers
16:48 Leave A10 on N10 to Angouleme Toll €11.20
Join A10 to Bordeaux
Merege in A63
Toll at Bayonne €3.2
Toll Biarritz €2.2
Toll Saint-Jean-de-luz €0.7
22:00 Arrive ETAP Saint-Jean-de-luz
http://www.accorhotels.com/gb/hotel-6560-etap-hotel-etap-hotel-ciboure-st-jean-luz/index.shtml
08:30 Leave take A63
Toll at Spanish Border €1.5
Join A8
Take A15 to Pamplona Toll €1.9
Fill Car €44
AT Pamplona AP15 to Zaragoza Toll€3.25 and €3.55
At Zaragoza take A23 to Valencia
A7 towards Albacete
Take A35 then A31 to Elche
Rejoin A7 to Murcia
Take RM2
Take RM23 to Mazarron
18:00 Exit 7 Arrive CDA
Total 1160 Miles Toll €57.25
Condado to Euro Tunnel
08:00 leave
12:15 Zaragoza
14:09 Pamplona
21:00 Arrive ETAP Tours
http://www.accorhotels.com/gb/hotel-5023-etap-hotel-tours-centre/index.shtml
08:00 Leave Tours
12:25 Arrive EuroTunnel
Phil