Not according to my 26,000km experience with my 90TSI Lucas. It is the least economical of the new Golf versions and yet my 3 long term averages have been 5.2L/100km, 5.4L/100km and 5.3L/100km. I have to be breaking the law to go over 5L/100km on the open road. For example, I have just driven from Toowoomba to Blackheath in the Blue Mts via the New England H'way and when filing it at Richmond it showed 4.6L/100km average after 940km and 190km still in reserve. It actually took 45L for a true 4.7L/100km. This is just so typical of the long distance driving I've been doing Earlier in the week I travelled from Toowoomba to Redcliffe north of Brisbane return including the peak hour traffic through Brisbane itself. The MFD said 4.4L/100km average for the 351km and it actually took 16L to fill for a true 4.5L/100km. VW claim a combined of 5.7L/100km and an extra urban of 4.9L/100km. To achieve these figures I simply travel on the very edge of the law - few people overtake me. So don't under estimate the new petrols. My friend's Mk5 1.9TDI manual struggles to match it.

I also notice someone doing the calculations using a price differential between diesel & 98RON of 20c/L. Not where I drive - it is usually less than 10c/L and even less again at the low part of the petrol cycle. Diesel doesn't get that advantage.

Quote Originally Posted by Lucas_R View Post
In the real world, the 103TSI will use more than 4.6L/100km. I'd re-do your maths using 6.0L as a more realistic figure for highway driving.

The diesel, on the other hand, will be sub 5.0L