Fuel economy of non-turbo 7.3 IDI?
#16
03-19-2013, 12:39 PM
Also on the topic of oil, ALL oils have to pass a benchmark, often times what you have to look for is what they ADD to the oil, not what they leave out Penzoil for instance..*shudders*
Fuel economy though, being SWB and OD id say 20 is not unreasonable if everything is in good shape, especially with 3.55s
Fuel economy though, being SWB and OD id say 20 is not unreasonable if everything is in good shape, especially with 3.55s
#17
02-06-2017, 06:32 AM
#18
02-06-2017, 11:13 PM
Posting Guru
Delo 400 15/40 with 2 quarts mobile 1, 0-40 M full synthetic, it the only oil that Mercedes will use in there diesel engine cars, it meets all the European oil standards, and mobile 1 601 power stroke filter, its bigger, and has duel filtration 5 micron and 16 micron. 14-16 mpg, the girls pull horses at 60mph. 4.10 rear, e4od, low stall converter.
#20
02-08-2017, 11:05 PM
More Turbo
About 15 mpg in my 88 F-250 7.3/5-speed/4.10/4x4 reg cab. That's doing 70-75 mph on highway 75% of the miles and 25% city. I have approx 32 inch tall all-terrain tires. The 4x4 will not get as good mpg as a 2wd, and bigger off-road type tires also will hurt mpg some. I could probably get better mpg if I drove slower.
#21
02-10-2017, 12:21 AM
been averaging 12.7 lately with the 92, very slowly, steadily getting worse. Swapped pump and injectors off an engine that ran great, no difference. Currently timed at 8* BTDC via pulse adapter. Not sure if i want to compression test it or not lol. Granted, most all the miles are 75-80mph or stop / go city driving, but used to get 14.5
#22
05-25-2020, 02:54 AM
1989 F-450 11ft Flatbed
This is my first truck. I have a 1989 F350 with a non-turbo 7.3 IDI motor in it, with about 162,000 miles. It has a 5-speed manual transmission, it's 4x4 and it's a single cab long bed I think. I recently put 285/75r16s mounted on 16x8 wheels on it. I have two 15 gallon tanks, as well. I'm not sure about the gears, though. I'm not going to be towing anything, just driving it. I won't be going on the highway much of ever, either. Just around here on country roads and all that. Can anybody give me an estimate of the fuel mileage I should expect with this truck? The guy who sold it to me said around 16 mpg, but I wanna be sure. Thanks!
Thanks for the advice,
Emily Shelton
#23
05-25-2020, 08:13 AM
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I am looking to buy an 89' F-450 11ft flatbed 7.3L 5 speed manual w/ regular cab. I don't know the rear-end size or the tire size. Does anyone know the range for the MPG on this truck? It will be a daily driver and to pull my 23' bumper pull RV.
Thanks for the advice,
Emily Shelton
Thanks for the advice,
Emily Shelton
unfortunately that truck is going to be a fuel hog. there were two gear ratio options on the F-SuperDuty, 4.63 and 5.13, 4.63 was kind of rare.
#24
05-25-2020, 08:13 PM
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I am looking to buy an 89' F-450 11ft flatbed 7.3L 5 speed manual w/ regular cab. I don't know the rear-end size or the tire size. Does anyone know the range for the MPG on this truck? It will be a daily driver and to pull my 23' bumper pull RV.
Thanks for the advice,
Emily Shelton
Thanks for the advice,
Emily Shelton
#25
05-25-2020, 08:14 PM
Just to chime in here, I have a 85 F-250HD with 4.10 rear end gears and a 6.9 paired with a C6 transmission. I get 12 on a good day, kills the pocket but I love the truck. If I could find a cheaper way to get more economy out of it I would it in a heartbeat. Anybody know why I cant get these numbers that sound like a pipe dream to me? Oh and I should add it's a reg cab long bed 4x4.
#26
05-25-2020, 08:27 PM
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Just to chime in here, I have a 85 F-250HD with 4.10 rear end gears and a 6.9 paired with a C6 transmission. I get 12 on a good day, kills the pocket but I love the truck. If I could find a cheaper way to get more economy out of it I would it in a heartbeat. Anybody know why I cant get these numbers that sound like a pipe dream to me? Oh and I should add it's a reg cab long bed 4x4.
#27
05-26-2020, 05:21 PM
Just to chime in here, I have a 85 F-250HD with 4.10 rear end gears and a 6.9 paired with a C6 transmission. I get 12 on a good day, kills the pocket but I love the truck. If I could find a cheaper way to get more economy out of it I would it in a heartbeat. Anybody know why I cant get these numbers that sound like a pipe dream to me? Oh and I should add it's a reg cab long bed 4x4.
Maybe you IP timing ain't right too....
12 MPG is really low that's more like what a 460 Gashog gets. Som Ting Wong
I will add that 4X4 always got worse mileage than the RWD and dually is less economical too.
#28
05-26-2020, 05:25 PM
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not really wolfie.
4.10 gears C6 trans and 40 cetane fuel is only going to give up around 12-14 mpg.
back in the good old days when we had 60+ cetane fuel my 4X4 with C6 and 4.10 gears could see 20 -22 regularly if i was granny drive on the interstate. but not these days with the watered down crap they are calling diesel fuel.
4.10 gears C6 trans and 40 cetane fuel is only going to give up around 12-14 mpg.
back in the good old days when we had 60+ cetane fuel my 4X4 with C6 and 4.10 gears could see 20 -22 regularly if i was granny drive on the interstate. but not these days with the watered down crap they are calling diesel fuel.
#29
05-26-2020, 05:32 PM
not really wolfie.
4.10 gears C6 trans and 40 cetane fuel is only going to give up around 12-14 mpg.
back in the good old days when we had 60+ cetane fuel my 4X4 with C6 and 4.10 gears could see 20 -22 regularly if i was granny drive on the interstate. but not these days with the watered down crap they are calling diesel fuel.
4.10 gears C6 trans and 40 cetane fuel is only going to give up around 12-14 mpg.
back in the good old days when we had 60+ cetane fuel my 4X4 with C6 and 4.10 gears could see 20 -22 regularly if i was granny drive on the interstate. but not these days with the watered down crap they are calling diesel fuel.
I just recently checked my fuel cetane and I'm at 49-52 in my tank right now.. it's Valero Diesel and it's over a year old.... I will be filling up again here pretty soon as I need to take the truck for State inspection.
#30
05-26-2020, 10:36 PM
