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  #37  
Old 09-24-2013, 07:50 AM
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Re: I'm blown away by the MPG on the 2014 3.6L

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Originally Posted by Supertech30 View Post

5w-20 for the V6...
Thank you Sir!

I'll be changing my oil for now on since they're not free anymore from the dealership.

I think next time I put Mobil 1 5w20 in my Jeep...EP if it's on sale.
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  #38  
Old 09-24-2013, 08:09 AM
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Re: I'm blown away by the MPG on the 2014 3.6L

I will gladly explain, just not typing on my phone. I daily drive a turbocharged Subaru. I love the available instant torque and acceleration and the long revving range (red line @ 7500 rpm). I've driven diesels in my native country and I admit they're good but fall flat on your face later. The 8 speed gearing will help, as did the 7 speed in the Audi I test drove. But the Audi also revved to 5500...

Now, you might be familiar with how alternators work. On most newer cars, a clutch pack regulates when the alternator engages and when there is only a small parasitic loss from a free spinning pulley. There are superchargers like that. Nissan XTerra had one, various Audi and VW have it. That is what I have in mind, not a permanent pulley driven, fuel economy sapping solution.

the other thing I dislike about the diesel is the added weight. I would live with 100-150 extra lbs but 400 lbs is inconsistent with my ideals. There's VW cars out there that don't weigh that much differently between a 2.0 turbo and a 2.0 diesel TDI. Probably due to use of other weight saving methods elsewhere...not simply due to better powertrain engineering.

Quote:
Originally Posted by ExcursionDiesel View Post
I don't think your reasoning against the diesel will hold true. You are comparing a comparatively underpowered v6 (torque, drivability, towing) when the v8 is the one to compare with the CRD.

The fact that you want a supercharger to beef up the v6 confuses me because any advantage the v6 has (economy, lower cost) are gone once supercharged. Furthermore, the long term durability of the lightweight low torque v6 will be compromised. It will cost every bit of $4000 to add a supercharger and you will end up with no warranty, poor mileage, less reliability....and it kills any argument against the hemi or CRD.

bd
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  #39  
Old 09-24-2013, 12:13 PM
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Re: I'm blown away by the MPG on the 2014 3.6L

My 2012 JGC with the 3.6.liter V6 consistently gets around 25 MPG on the highway. I think that's great given the size and weight of the vehicle. The JGC is a great SUV. I have 30K on mine, no problems or other issues with it.
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  #40  
Old 09-24-2013, 12:24 PM
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Originally Posted by gajim View Post
My 2012 JGC with the 3.6.liter V6 consistently gets around 25 MPG on the highway.
At what speed? Flat ground or hilly terrain? Someone on here claimed 28mpg running below 60. MPGs suffer as speed increases.

Most of my driving is on 4 lane roads at 70+ mph with moderately hilly terrain. I'd be shocked to see anything over 22-23mpg in the v6.

bd
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  #41  
Old 09-24-2013, 12:51 PM
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Quote:
Originally Posted by f1anatic View Post
I am sure the diesel would be more awesome - fuel efficiency wise - BUT that car would have been 400 lbs heavier and 4000 $ more expensive. Only negatives. And in Chicagoland, this summer diesel pushed 3.90-4.00 whereas gasoline was never higher. Now, heading into winter, gasoline will continue to drop and the diesel to cost more. The math was just not in favor of the diesel, short term or long term and I would buy the V6 again, even now. I've done true off-roading with the car (probably I am the only idiot in North America who willingly put scratches on his $45,000 rig after just 4 months, going through the bushes) and I've done true long distance driving (4000 miles round trip out west). The V6 impressed me with the fuel efficiency, the willingness to accelerate the tank and its efforts off-roading. If towing is not needed or ocassional, I remain of the opinion that the V6 is the better choice for an all-rounder. That being said, I still think Jeep should get rid of the 5.7 V8 and just supercharge the V6. I would probably buy that one. Or...in time, supercharge it myself.
not the only idiot. msrp 52k for my overland, 1200 miles on it, already has off road battle wounds.... jussayin lol. also are you kidding about the hemi? they get rid of a v8 option And i wont buy it... trucks need v8's.
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  #42  
Old 09-24-2013, 01:00 PM
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also, im able to get my Hemi to the 20's quite easily in town, feathering the gas and still doing the speed limit +5. on a 20 mile trip the other day, my evic was reading 31 mpg on the highway, then of course i went off roading and that went to shit lol.

also, "instant torq" on a turbo? what are you smoking. most turbo's have some sort of lag, as they rely in exhaust gasses to spool, and this create boost, a supercharger turbo is belt driven as said, which creates less lag but hurt gas mileage at the expense of power. a centrifugal turbo adds power and fuel economy. Dont believe me? let the turbo on a diesel go out and watch mpg plummet , or take the same ci engine one N/A and one turbo and compare the mileage.
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  #43  
Old 09-24-2013, 02:06 PM
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Quote:
Originally Posted by Baalic View Post
also, "instant torq" on a turbo? what are you smoking....
Diesel crack....the good stuff...Lol. The GC CRD uses a variable geometry turbo to provide better spool up. Yes, there is a lag but not one measured in seconds...more like tenths. We aren't racing...we are daily driving.

Torque, and lots of it, is available "instantly"....not drag race instant, but on demand with little to no lag unless you are idling. If you are wanting to pass, its there...lots of it, without high rpms, downshifts....just torque.

This isn't my first rodeo. Modern diesels perform well. They aren't slow, often they perform better...and all the while, they often achieve much better than EPA numbers. We will see in a few weeks.

bd
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  #44  
Old 09-24-2013, 02:09 PM
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Re: I'm blown away by the MPG on the 2014 3.6L

i have no turbo lag on my Subaru. Then again, i never claimed it was stock. I just have something that pulls 2000 to 7000 rpm.

research the superchargers. These days, idle or cruising speeds or light acceleration does not elicit the activation of superchargers. Though i do recognize a parasitic loss exists all the time.

yes, V8 don't belong in SUVs any more. For most consumer applications there is a replacement for displacement. Emphasis on the MOST CONSUMER APPLICATIONS. Not racetrack zealots who supercharge their LS3s. V6 diesels belong in SUVs. Or supercharged V6 engines. Google up Land Rover Discovery LR4 or read here
http://m.motortrend.com/wot/2014-lan...-6-405837.html

Adding a few links here:
Eaton 's solution for increasing fuel economy in supercharged vehicles at low throttle loads.
Quote:
Q: What is this black plastic object on the side of my supercharger? What is a bypass valve?
A: That object is the bypass valve vacuum actuator. This unit has a vacuum port that connects to the supercharger inlet between the rotors and throttle body. This actuator opens and closes a bypass valve for the supercharger. This valve is open when throttle loads are low and closed when throttle loads are high. With the bypass valve open there is no pressure being created across the supercharger. This allows the supercharger to have an almost negligible parasitic loss in this condition. With the bypass valve closed, all airflow is routed through the supercharger and boost is created in the intake manifold. In some newer applications this actuator is also controlled by a solenoid.
Rotrex has a different approch.
At the end of the day superchargers come into two flavors: Roots style (Eaton) and Centrifugal (turbo-like), both with benefits and issues. And each manufcturer has its own solution to minimizing parasitic losses at low throttle loads. Yes, the cost of doing it right with a supercharger is high as an aftermarket solution, but it can be done right from the factory as an alternative to larger displacement engines. Look at Mercedes - it has been supercharging successfully cars for a long time now (C-Klasses; E-Klasse - who can forget the E-55 AMG?)
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  #45  
Old 09-24-2013, 04:03 PM
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Quote:
Originally Posted by ExcursionDiesel View Post
Diesel crack....the good stuff...Lol. The GC CRD uses a variable geometry turbo to provide better spool up. Yes, there is a lag but not one measured in seconds...more like tenths. We aren't racing...we are daily driving. Torque, and lots of it, is available "instantly"....not drag race instant, but on demand with little to no lag unless you are idling. If you are wanting to pass, its there...lots of it, without high rpms, downshifts....just torque. This isn't my first rodeo. Modern diesels perform well. They aren't slow, often they perform better...and all the while, they often achieve much better than EPA numbers. We will see in a few weeks. bd
so you have a power-stroke and don't think their is lag? "assuming based on SN" well, i have driven Gas turbo's, diesel turbos and big-rig diesel turbos, and im talking brand new cars/trucks. there is turbo lag on every one of them. hence why in racing world we "brake boost" our turbos to launch with close to full spooled turbos.


2008-2014 ford diesels i have the most experience with, and yes both their old and their new engine, my work truck is a 2008 Diesel f350.

btw, ford diesels aka powerstroke aka power-jokes suck...

a big reason you see a lot of twin turbo systems especially with off sized turbos is to have the smaller one help spool the large one.

given i can't speak for the new CRD in the jeep, but I have yet to have one turbo car perform different then what I expected.

the "v8" muscle idea helped fuel the golden era for automobiles, and even old school jeep guys still throw 350's and other small block v8's in their jeeps. so but offering it with a v8, guys like me don't have to do a full custom job.


also i bought my new jeep because i HATED the lack of real power in the v6's .
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  #46  
Old 09-24-2013, 04:24 PM
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Quote:
Originally Posted by Baalic View Post
so you have a power-stroke and don't think their is lag? "assuming based on SN"
Yep...I have the last of the 7.3's. Not a race truck at all. I'm maxed out near 400 RWHP with an aftermarket tuner, turbo and injectors. I have a PMR motor so that's all I can safely do. I tow so a mild lag isn't a big deal.

Lag is relative. My MercBenz 300SD has real lag, and when driving, one must take this in account. My truck, not so much. If I was racing, yes both are laggy by that standard.

For daily driving, a 0.3 sec lag wouldn't bother me. We are talking about daily drivers here. The variable geometry on the Jeep helps lag and if passing, torque should come quick by non-racing standards.

The Aussies, who have been driving the VM 3.0 GC for a while now, report the responsiveness as being on par with the Hemi at anything but wide open throttle.

bd
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  #47  
Old 09-25-2013, 07:29 AM
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Re: I'm blown away by the MPG on the 2014 3.6L

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Originally Posted by Baalic View Post

also, "instant torq" on a turbo? what are you smoking.

You obviously haven't driven many of the newer turbocharged Audi or Subarus. Even the turbocharged Mustang V6 beats the 5.0 around the track (due to lesser weight up front).

My 2012 STI instantly pulled like a raped ape out of the hole...even better after an OTS Cobb Stage I reflash.

The days of the V8 engine are numbered my friend, we're already seeing this with the coming of the EcoBoost engine from Ford in the F-150.
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  #48  
Old 09-25-2013, 11:26 AM
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Quote:
Originally Posted by GCLimited View Post
You obviously haven't driven many of the newer turbocharged Audi or Subarus. Even the turbocharged Mustang V6 beats the 5.0 around the track (due to lesser weight up front). My 2012 STI instantly pulled like a raped ape out of the hole...even better after an OTS Cobb Stage I reflash. The days of the V8 engine are numbered my friend, we're already seeing this with the coming of the EcoBoost engine from Ford in the F-150.
I don't buy Ford's, and will
continue to buy cars with V8s, if said car is a sports car or a truck. if that means shopping for a brand that offers it then that's what I will do. As a consumer, they are going to make what we want, and I know I'm not the only one. and when the new corvette with a 6.2 v8 can get over 30 highway, i say bring on the v8's . lol
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