MPG - 3.7 V6 vs 5.0 V8
05-09-2015, 10:50 AM
#21
My boss has a 2013 4wd supercab with the 3.7 he bought new. It's a nice looking truck, Kodiak Brown metallic. He's got it up for sale. He swears he gets 15 mpg. Admittedly, he's not going to get good mileage in anything, he drives 80 plus on the interstate. But the fact that the V6 is capable of getting that low mileage (I saw 15.2 on the dash readout) and the fact that he's having a heck of a time selling it, I'd personally pass on the NA V6. That's just me, though. I'd rather have the V8 or the turbo engine. If I didn't trust the reliability of those, I think I'd choose another brand.
I do agree the 5.0 is prone to knocking. My 2013 did, traded it for my wife a new Toyota. So I'm on the fence on what I'll buy next. If I'm spending a fair amount of money, I'm personally not interested in the NA V6. Lower resale, and I don't think the fuel mileage is earth shattering.
I do agree the 5.0 is prone to knocking. My 2013 did, traded it for my wife a new Toyota. So I'm on the fence on what I'll buy next. If I'm spending a fair amount of money, I'm personally not interested in the NA V6. Lower resale, and I don't think the fuel mileage is earth shattering.
The 3.7 has 300 hp, and no matter what type of engine it is, it will be able to burn "300 hp" worth of fuel. So as an example, while towing our 11' tall (now lifted) box of a trailer, it can be beat down to well under 10mpg.
But driven equally, it's higher BSFC, and lower frictional and pumping losses, it should yield better mileage, and that has been my experience. That said, the 5.0 is a fantastic engine for those that need it or feel that they need it. But it just doesn't get as good mileage.
And the new 2.7 blows them both away, if you can drive it sedately that is!
05-11-2015, 08:09 PM
#22
FWIW, the 3.7 isn't immune to knocking either. I just talked to a guy who has one (a '13 I think) and his started knocking at 30k miles. He took it to the dealer and said they already had a long list of warranty claims for a whole bunch of 3.7 trucks that were ALL knocking. So he had to get in line behind over a dozen other 3.7s that were ALL in for the same knocking and ALL had replacement blocks on order. Unbelievable.
I've always been a big ford guy but this kind of crap is starting to make me reconsider.
I've always been a big ford guy but this kind of crap is starting to make me reconsider.
Last edited by johndog82; 05-11-2015 at 08:22 PM.
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iFord (07-31-2015)
05-12-2015, 12:21 AM
#23
A long list? Let's see some proof, because I have not heard anything, either through the warranty grapevine or from the shop foreman I know. Practically no service bulletins either. There will always be the odd one here or there, but even in the stangs and MKx's there are precious few unprovoked failures.
Do tell what dealer he is at, I'd like to verify this if you won't.
Do tell what dealer he is at, I'd like to verify this if you won't.
05-12-2015, 01:30 PM
#24
A long list? Let's see some proof, because I have not heard anything, either through the warranty grapevine or from the shop foreman I know. Practically no service bulletins either. There will always be the odd one here or there, but even in the stangs and MKx's there are precious few unprovoked failures.
Do tell what dealer he is at, I'd like to verify this if you won't.
Do tell what dealer he is at, I'd like to verify this if you won't.
05-12-2015, 06:47 PM
#26
05-13-2015, 01:14 AM
#27
People
Last edited by johndog82; 05-13-2015 at 01:25 AM.
05-14-2015, 11:26 PM
#28
Senior Member
The 3.7 has 300 hp, and no matter what type of engine it is, it will be able to burn "300 hp" worth of fuel. So as an example, while towing our 11' tall (now lifted) box of a trailer, it can be beat down to well under 10mpg.
But driven equally, it's higher BSFC, and lower frictional and pumping losses, it should yield better mileage, and that has been my experience. That said, the 5.0 is a fantastic engine for those that need it or feel that they need it. But it just doesn't get as good mileage.
And the new 2.7 blows them both away, if you can drive it sedately that is!
But driven equally, it's higher BSFC, and lower frictional and pumping losses, it should yield better mileage, and that has been my experience. That said, the 5.0 is a fantastic engine for those that need it or feel that they need it. But it just doesn't get as good mileage.
And the new 2.7 blows them both away, if you can drive it sedately that is!
But still, I was surprised by the 15 mpg avg out of the 3.7. I have no personal experience with that engine, but if the 5.0 gets about 1 mpg less (I'm thinking you'd have to hammer the 5.0 pretty hard, not towing, to average 14 mpg), I'd rather have the additional power I think. I imagine his truck has 3.73's, which I'm sure doesn't help fuel economy at 80 mph.
On a side note, my wife's Toyota Highlander V6 gets a little over 20 mpg going 80 mph. Of course it's 2wd, lighter, etc. No idea of the hp, but it doesn't feel weak at all. Maybe something wasn't right with his truck... It's sold now anyway. He bought an older truck with the 5.4 to pull a really small dozier (similar to a small tractor in weight).
05-16-2015, 10:03 AM
#29
Senior Member
05-17-2015, 01:38 AM
#30
The 3.7 has 300 hp, and no matter what type of engine it is, it will be able to burn "300 hp" worth of fuel. So as an example, while towing our 11' tall (now lifted) box of a trailer, it can be beat down to well under 10mpg.
But driven equally, it's higher BSFC, and lower frictional and pumping losses, it should yield better mileage, and that has been my experience. That said, the 5.0 is a fantastic engine for those that need it or feel that they need it. But it just doesn't get as good mileage.
And the new 2.7 blows them both away, if you can drive it sedately that is!
But driven equally, it's higher BSFC, and lower frictional and pumping losses, it should yield better mileage, and that has been my experience. That said, the 5.0 is a fantastic engine for those that need it or feel that they need it. But it just doesn't get as good mileage.
And the new 2.7 blows them both away, if you can drive it sedately that is!