4 liter gas mileage

How so? Is the 4runner not reliable?

 

I'd have to find the post where someone with more knowledge than I knew exactly why. But essentially it boils down to, less intricate parts = less shit to break. And since it's only the HP not the TQ that was being affected with the Dual VVTi, no real point in adding it.

 

My 09 4 banger 4x4 3" lift running 265/75 16 LT and 100 miles a day, I get low to mid 19's. Not bad for a truck with the aerodynamic properties of a brick.

 

Yeah, I don't buy that. The VVTi motor makes more power and torque. I don't know much about Toyota's VVTi system, but I can't think of a reason it would be more stressed in the Tacoma than it is in the 4runner, and if they felt it was reliable enough in that...

 

Ford did a survey on what owners of their F-150 were concerned about, and MPG's ranked 27th. Didn't buy a Tacoma for the fuel economy, but I too have wondered why its so bad. It think boost and a lead foot might have something to do with that though....

 

Your statement sucks, I wouldnt stand behind it much less alone write it, jk!

Toyota has the means and technology to build this car:

https://ssl.toyota.com/mirai/fcv.html

and this supercar:

http://www.lexus.com/models/LFA/

But you somehow think they CANT build a higher mpg truck. They can, but the market doesnt want it or need it because it will be too expensive.

 

Do you think the 4runner engine would be as reliable as a truck engine. Will it be reliable with constant towing and hauling. That's the question you should be asking, and the answer is .... probably not.

 

I have an 07 V6 4runner and an 05 V6 Taco that I drive the same manner day to day. Both 4x4, both stock tires. The Taco is lighter by a few hundred lbs. The 4runner consistently gets 22mpg, the Taco gets 18-19 at best. Definitely something different there.

 

my '13 DCLB averages 21, best I've gotten is 24.

 

The problem behind this out of the factory truth, is that a lot of that has to do with the tuning alone. Whether there inherent differences from dual VVT-I make such an improvement alone, versus single VVT-I, tuning being equal. Taking into account that historically a dual VVT-I will make more power than its single VVT-I predecessor, the unknown "problem" won't be found until someone wants to get into the tuning software.

As recently found, ignorance has been bliss with the '05-'15 single VVT-I cam tuning. They did the least amount as possible, likely due to cost/time, to meet a specific goal. When OVTune started working with the OEM ecu, this is when they found that a lot of refinement of the intake cam phasing map was yet to be realized. On the TRD reflash, that map is expanded even more, as well as overall fuel, load, and timing aspects.

Based off of another member using a standalone ecu, a point of reference for validation is given, when they tuned their single VVT-I map. Gaining around 20 more HP. Unfortunately I do not have a dyno graph to offer.

Point being, some dedicated tuning can easily make the single 1GR more efficient than it came from the factory. More efficient can translate to more economy and power. As well as it is an stronger engine in design, than the dual.

 

Thought it might have been you who posted in the other thread I was thinking about.

 

My 08 4.7 V8 4runner (love that engine) averaged 16mpg mixed driving over the course of a year. My taco averaged 15 over the course of my first year with it, but I have E-rated tires and a massive leadfoot problem.

 

Toyota has the means to improve here. My old Sequioa got 18 on the hwy, my new tahoe gets 23 and has more towing and horsepower. If my tahoe can get that, so can a tacoma.

 

While I will always wish for better mileage, I'm pretty happy with my '15 DCLB average 19.5mpg 50/50 driving. I try to keep it modest, but highway is usually 65-72. Not much sitting in traffic.

Definitely room for improvement, but I would take reliability over a few MPGs any day.

 

Considering they are essentially the same engine, yes, I think the 4runner engine is just as reliable as the Tacoma engine.

 

Yes, tuning can make the single 1GR more efficient than it was from the factory. Tuning a dual VVTi engine could also improve the power and efficiency, and having the ability to adjust cam timing on both camshafts should provide a more efficient, powerful motor than the single 1GR.

Is there some reason that you think the dual VVTi engine isn't as strong as the single? Load on the engine isn't transmitted through the camshafts, so I guess I don't see why it would be any weaker.

 

And the Tahoe will get even better gas usage when its being towed back to dealership for repairs.

 

I get about 20 on Highway in my ‘15 TRD 4x4 AC 6speed as long as I’m going 65 or under.

 

The internals are weaker. Less counter-weights on the crank, slightly less material on the pistons and rods. The dual VVT-I 1GR can not handle near the boost that the single can due to these deficiencies. Slightly knock will wreak havoc on that engine. Even N/A. They had the opportunity to improve completely, but cut corners in the short block.

Side note. Friends 2006 1GR single VVT-I 4Runner regularly gets 21-24 mpg on long trips. Depending upon how heavy his foot gets.