leversole Posted May 12, 2011 Share Posted May 12, 2011 Filled 'er up today...did the calculations and found that I got 7.9 MPG this week! Though I would happily give some of that mileage up to hook about 50K to her and pull it around! Quote Link to comment https://www.bigmacktrucks.com/topic/19041-great-fuel-mileage/ Share on other sites More sharing options...
Mike Posted May 12, 2011 Share Posted May 12, 2011 Filled 'er up today...did the calculations and found that I got 7.9 MPG this week! Though I would happily give some of that mileage up to hook about 50K to her and pull it around! Sounds like you may want to keep that truck. It would be a good thing if you could hook up a heavy load to it. It could help that engine build some useful heat, and burn some carbon away. mike Quote Link to comment https://www.bigmacktrucks.com/topic/19041-great-fuel-mileage/#findComment-77674 Share on other sites More sharing options...
mowerman Posted May 13, 2011 Share Posted May 13, 2011 ya,it would be fun till you hit a little hill with that small motor,,and see how bad it falls down..bob Quote Link to comment https://www.bigmacktrucks.com/topic/19041-great-fuel-mileage/#findComment-77725 Share on other sites More sharing options...
Rob Posted May 13, 2011 Share Posted May 13, 2011 ya,it would be fun till you hit a little hill with that small motor,,and see how bad it falls down..bobWhile probably true, it would in fact make it over the top.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/19041-great-fuel-mileage/#findComment-77727 Share on other sites More sharing options...
leversole Posted May 13, 2011 Author Share Posted May 13, 2011 ya,it would be fun till you hit a little hill with that small motor,,and see how bad it falls down..bobWell, they were ALL small at one time...still got the job done! Quote Link to comment https://www.bigmacktrucks.com/topic/19041-great-fuel-mileage/#findComment-77729 Share on other sites More sharing options...
b61fred Posted May 13, 2011 Share Posted May 13, 2011 My old b61 had the 673 non turbo engine 170 hp in it's prime, When I would put the trailer and two old John Deeres on, it would fade pretty fast on the hills. I thought thats just the way things were back then. I took the time check all the valve clearance, check the fuel lines to the the engine serviced the air cleaner and some othe minor tune up stuff and it made a hell of a difference. The fuel line was deteriorated from the fuel tank to the injection pump. The oil bath air cleaner had so much dirt caked in the mesh and the air intake, and the valves were WAY out of adjustment. It started beter and didn't have as much smoke on start up. I did eventually install a 237 in its place and that was by far the best investment in the truck. Quote 15 gears...no waiting! Link to comment https://www.bigmacktrucks.com/topic/19041-great-fuel-mileage/#findComment-77758 Share on other sites More sharing options...
mowerman Posted May 13, 2011 Share Posted May 13, 2011 i can remember pulling the grapvine,at 10 miles an hour.with a 250,,,urrrrrrrgggg..hehe,dont miss that part of it,,bob Quote Link to comment https://www.bigmacktrucks.com/topic/19041-great-fuel-mileage/#findComment-77763 Share on other sites More sharing options...
mowerman Posted May 13, 2011 Share Posted May 13, 2011 but on a happier note,,you can actually go thru all the gears,with a descent load,,have a ball my friend...bob Quote Link to comment https://www.bigmacktrucks.com/topic/19041-great-fuel-mileage/#findComment-77764 Share on other sites More sharing options...
Mike Posted May 13, 2011 Share Posted May 13, 2011 but on a happier note,,you can actually go thru all the gears,with a descent load,,have a ball my friend...bob About the same as I would have said to him. These trucks were pulling shorter single axle trailers, even when a bulldozer was on them. They did what was thrown at them and did their jobs well with what they had. Got to go mike Quote Link to comment https://www.bigmacktrucks.com/topic/19041-great-fuel-mileage/#findComment-77767 Share on other sites More sharing options...
mowerman Posted May 13, 2011 Share Posted May 13, 2011 ya,,lets do like 20-25,000 ...hehe to be on the safe side,whatta ya think? bob Quote Link to comment https://www.bigmacktrucks.com/topic/19041-great-fuel-mileage/#findComment-77768 Share on other sites More sharing options...
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