PDA

View Full Version : Ford 4.9L 300 Inline-6 Owners Please Post Here: MPG, reliability, overall experience


genesis215
06-21-2009, 11:35 PM
I am thinking about buying an Inline-6 F150, and wondered what you guys thought about them. I am particularly curious about the fuel mileage. I don't need something with a lot of power or off-the-line zip, but just something that will tow a small load decently, and get great mileage.

Fueleconomy.gov says that the 85' and 86' carbureted 300-6 got 24 and 25 MPG highway, and then dropped down to 20 MPG highway with the introduction of fuel injection in '87. Anybody have some opinions on this? I did run into a guy that owned a '65 F150 with this engine, and he got 26 MPG. That sounds amazingly good. Will the EFI really get that much worse? Just wondering.

I will only be towing about 2000-3000 lbs. at the most with it. If there are any other options besides the Inline-6 that get great mileage and will still tow I would be very open to hearing about them. Sorry for the long post, but I would really appreciate good info about this. Thanks.

Gravel Rat
06-22-2009, 12:07 AM
My old carbureted 300-6 did better than my dads 96 300-6 in the mileage dept. The 300-6 was a good engine just don't expect any speed out of it.

Never did hand calculate the mileage but I don't think my old 79 F-150 4x4 ever got any more than 20 mpg. Dads fuel injected truck F-150 2wd wasn't that great on fuel

TXNSLighting
06-22-2009, 01:33 AM
I had a 91 F150 with the I6. It was a great engine, had great power, and some decent speed. Fuel mileage was around 14 in town, and 18-19 on the highway. The best part was the torque. It was a monster in that department!

poolboy
06-22-2009, 07:01 PM
I had a 93 f-150 w/ I-6. I can't remember what the MPG were, but I did have over 265k miles before the transmission (auto) gave in; than I sold it. The motor still ran strong though, with no smoke.

genesis215
06-23-2009, 11:49 PM
Thanks for the replies, guys! So it sounds like it's quite fuel-efficient engine for a truck, right? Is there anything else that will pull my load and get better mileage? Just wondering. I did find an '89 extended-cab model w. the 4.9L 300-6 and 5-speed manual in great shape with 192K miles for just under $1000. It has been owned and very well maintained by a service tech it's whole life. Is this a good deal?

Milwaukee
07-16-2009, 08:10 PM
own 79 F150 4x4 with 4.9L it tough engine. It get 15-19 mpg.


I wish they include 4.9L in F350 I would buy if I see.


Use motorcraft oil filter FL1A for that engine.

Don't rev it hurt.

you get best mpg by stay 2,000 rpm.

wellbuilt
07-16-2009, 09:08 PM
I had a 89 in line 300 in a f150 5 spd great truck . My mileage was 15 highway . I had about 1500lbs in tools . My f 250 had a auto 3 spd with 411 rear gears same mileage . John

ZTR_Diesel
07-16-2009, 09:52 PM
I worked at a camp in Wisconsin that still has 6 or 8 of them in thier trucks. One or two in vans as well. No idea of mileage - it was all 20 mph or less, around camp use. Turth be told, they disposed of a truck that year that still ran very well, but you could lift off the bed on the drivers side by hand. They finally decided that old F250 was more of a safety risk than it was worth.

You may be able to buy something with better fuel economy, but you'll spend more buying it.

grass_cuttin_fool
07-16-2009, 10:10 PM
Like everyone else........around 20mpg empty...........15 loaded......not a speed demon but just alot of pulling power....good engines

J&R Landscaping
07-16-2009, 10:19 PM
1988 f150 with the 4.9L efi and a ZF 5 speed tranny. 15-17 towing a 6x12 open trailer. 19-21 on the highway.

Mahoney3223
07-16-2009, 10:23 PM
i had an 89 efi I-6 in an 89 f150 2wd. had 172k on it before i sold it. Didn't use one drop of oil and i pulled with it everyday for 3 seasons. best damn 6 cylinder ford ever made. they should be beaten to death for replacing for the new ^%$$&* 6 cylinder. has awesome torque and pulling power but don't expect to go fast.

supercuts
07-17-2009, 10:41 PM
I had a 94f150 with a 4.9efi. its been a long time but i think it was only around 14-17mpgs. it wont win a race, but it will pull a bit slowly accelerating. i sold it in 01' with 175K on it. i just moved down the street to the guy i sold it too. he still uses it daily and i see it all the time and want it back just like every other truck ive owned

Need4racin
09-20-2009, 02:14 AM
1988 f150 with the 4.9L efi and a ZF 5 speed tranny. 15-17 towing a 6x12 open trailer. 19-21 on the highway.

Not to bump an old thread, but if your f-150 has a zf5 someone swapped it in. It didn't come stock.

The manual that came in the f150 was an m5od, and considered light duty. The f-250/350 got the zf5 manual, which is a HD trans.

Btw you can still find the 300 in f250/350s. It's mainly going to be in the 87-91 body style. Hard to find after that.

OKSooner
09-24-2009, 04:32 PM
I am thinking about buying an Inline-6 F150, and wondered what you guys thought about them. I am particularly curious about the fuel mileage. I don't need something with a lot of power or off-the-line zip, but just something that will tow a small load decently, and get great mileage.

Fueleconomy.gov says that the 85' and 86' carbureted 300-6 got 24 and 25 MPG highway, and then dropped down to 20 MPG highway with the introduction of fuel injection in '87. Anybody have some opinions on this? I did run into a guy that owned a '65 F150 with this engine, and he got 26 MPG. That sounds amazingly good. Will the EFI really get that much worse? Just wondering.

I will only be towing about 2000-3000 lbs. at the most with it. If there are any other options besides the Inline-6 that get great mileage and will still tow I would be very open to hearing about them. Sorry for the long post, but I would really appreciate good info about this. Thanks.

I've owned two of 'em. One in a 1980 F100... still having flashbacks to that previous life. The truck got about 18 mpg. I pulled a couple of things with it and it had no problem. Wasn't fast, but who cares? I got over 200,000 miles out of that one. Finally it spun a main bearing.

Right now I have a '93 F250. Much heavier truck, and it has the 4.10 gears in it with the 5-speed manual. Fuel injected. Slow, burns quite a bit of gas (I'm actually afraid to measure it), but it will pull anything. I've pulled small track-hoes and skid loaders with it with no problemo.

BTW, I thought that I'd heard somewhere that this particular engine wasn't introduced until 1972. I know Ford made a smaller 6cyl that they used in the older half-ton trucks that was more in the league of the old 235cid engine found in the old Chevy trucks or the Chrysler straight 6. I'm not sure about this though, just sayin'...

genesis215
09-25-2009, 11:47 PM
Still thinkin about getting one, and still puzzled about whether to get a carbed or EFI. I sure like the '92-'96 interiors a lot better, but don't know if it's best to go with an older one. I have gotten to see a few older carbed 4.9's, and they were just wonderful. Not really fast, but excellent torque. Any more opinions? BTW, the first year of the 300 straight-6 was 1965.

Need4racin
09-27-2009, 03:58 AM
You'd be crazy not to get EFI. The 351/460/300 went efi in 1988.

OKSooner
09-30-2009, 10:37 AM
Still thinkin about getting one, and still puzzled about whether to get a carbed or EFI. I sure like the '92-'96 interiors a lot better, but don't know if it's best to go with an older one. I have gotten to see a few older carbed 4.9's, and they were just wonderful. Not really fast, but excellent torque. Any more opinions? BTW, the first year of the 300 straight-6 was 1965.

Cool. That's good to know. Thanks for the info.