You could be right Shonky. It's a fair way off Tweak'e's economy...that's hard to beat.

I've got a spreadsheet set-up of my fuel usage/economy and every fill-up generates my consumption for the previous tank. The results have been fairly consistent.

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2002 Nissan Navara ST-R
Got: Ironman Suspension, Uniden UHF, JVC MP3/USB/CD Player, Pioneer 6inch 3-way front, Pioneer 6x4 4-way rear
Wanted: Better treads, Spotties, Snorkel, Side Rails, Tray cage, Dual batteries, Camping lights...blah, blah, blah!