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V8 mpg

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oakeedokee:
Tyre choice can have a huge effect on mpg. Mine is a 3.5 Efi, does 19 mpg on 235/85R16 Marshall MTs, but when I put the 265/75R16 Bronco Dirt Devils on it drops to 14mpg. And I can only do 55mph on the Broncos as they vibrate so much, but 70 mph comfortably on the Marshalls.

BRO:

--- Quote from: "oakeedokee" ---Tyre choice can have a huge effect on mpg. Mine is a 3.5 Efi, does 19 mpg on 235/85R16 Marshall MTs, but when I put the 265/75R16 Bronco Dirt Devils on it drops to 14mpg. And I can only do 55mph on the Broncos as they vibrate so much, but 70 mph comfortably on the Marshalls.
--- End quote ---


Obviously a lot of rolling resistance with the knobblies - like riding a racing bicycle with large smooth tyres compared to moutain bike knobblies - it's easy to see which takes less effort for a certain speed :)

When we were noise testing the Discos at work on driveby track or rolling road, Land Rover gave us a set of wheels with Disco sized slicks to run on, otherwise the tyre noise drowned out the exhaust noise  :lol:

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