Looking to buy a GQ (maybe a GU but I like GQs more) patrol for my first car. Already test drove a few 4.2s and 2.8s in my area. I can tell the RD28T is gutless compared to the TD42. I only work at Maccas and im scared im going to have trouble affording fuel for a TD42. How much better is the RD28T on fuel consumption? I live in sunshine coast so its mainly town driving to school and work and do it a bit of 4 wheeling in the local forestery. I want to stay away from 3 litres as many mechanics told me they have issues. Any help or tips would be great.

Cheers, Oscar.