Hi Guys,

I have a '92 4Runner/ Surf with the 3VZ–E (3.0L V6) Engine & I'd like to know how i could make it more fuel efficient?
I've topped up all the regular fluids, and done a minor service (Oil + Oil Filter + Radiator Flush + New Coolant) and everything seems to be running smoothly.

I've herd changing the air filter can give you more performance - is that true?

I've also been told that if i install something after my air filter that will make my air 'vortex' and that i will get better fuel efficiency - is that true?

Are there any other ways i could make my truck more fuel efficient? (I've been told that fuel enhancers and magnets don't work)

Cheers

Ben

Unless there is a serious problem with the truck, or you have too high of expectations the biggest change comes from how you drive.

Only thing that has helped very slightly (we're talkin' 1-1.5 mpg increase maaaybe) for my 1998 4runner is:
-cleaning the MAF sensor
-making sure air filter is clean
-making sure spark plugs are newer
-checking air pressure in tires often to make sure its not low
-Switching to synthetic oils in my engine, diffs, and transfer case (others will disagree)

Also, next time you get new tires make sure you get 6 ply tire instead of 8 or 10 ply and that can save you a couple mpg's. When I switched from 6 ply to 10 ply tires my gas milage dropped 2 mpg overall.

For one thing, Ben, the 3.0's power-to-weight ratio is against you, so the engine has to work harder to push that 2-ton brick--the 2nd Gen was notorious for low power and relatively poor economy (high teens on the hwy is about all she'll do usually). For changes, I wouldn't put much stock in those "vortex" gadgets, or any other whiz-bang cure-all--they're rarely worth the money (and may even cause problems of their own). Think good spark, smooth airflow, lower friction, and good driving habits. Top-quality plugs like NGK, clean filters, synthetic oil (cuts friction), and properly aired tires are some of the primary considerations. If you're willing to do some mods, headers are one of the best upgrades you can do for the 3.0, as it has one of the most restrictive exhausts known to man. Couple that with a nice free-flowing exhaust, and maybe an intake such as K&N's FIPK, and you should see some decent improvements in both power and mileage. And on a personal note, I've always thought you have some of the most beautiful and intriguing countryside on the globe! If I could afford it, I'd take a long trip there in a heartbeat! Best of luck, mate!

Hi Sherwood4Runner, cheers for the reply mate. Apologies for being a noobe in regards to tyres - but what is 6ply vs 10ply?

I'm running my tyres at 40PSI (I think that's about the right amount) - the air filters new.. and i was considering buying new spark plugs last weekend, but i couldn't decide between the $4 ordinary ones and the $20 platinum’s. (and no one could tell me the difference) - but do spark plugs really help with fuel efficiency? or is it just a good idea to replace spark plugs in an engine similar to it being good to change the oil?

Cheers,

Ben

Hi BuckNutBob,
Cheers for the reply mate, and yes we are very lucky down this way - we have very low unemployment though - so you could always try and angle a job over here

In regards to your suggestions. With the power to weight ratio - are the 4cl engines better? I bought the V6 rather then the 4's as i thought the V6 would be better?! (If I'm wrong please explain)

Cheers for the 'heads up' on the 'gadgets' - most ppl seem to be saying the same thing - its a wonder they are allowed to sell them if they don't work?!

OIL:
The oil i have in my car is the Castrol GTX for Modern Engines Castrol Malaysia - Castrol GTX Modern Engine 15W-40
it doesn't say anything about it being synthetic - should i swap? if so, to what?

Spark Plugs
The spark plugs on offer at my local SuperCheap Auto are $4 NGK's or $20 Bosch's! Sherwood4Runner also recommended i have new spark plugs - how do they help fuel efficiency, and are the NGK's ok? or should i go for the more expansive Bosch?

I'll leave the headers for now - I've restored cars, but i've never upgraded the engines - hence, i'd be a bit out of my depth!

Sorry for the Epic of an email - I'll understand if you don't reply till next Christmas

Ben

Hi again, Ben! Comparing stock to stock, the V6 is probably a better choice, but the 4-cyl. has better aftermarket support, and therefore more options for upgrading. Given your desire to stay stock, I'd keep the 6. Any synthetic oil should have it clearly marked, as it is a major selling point. It IS more expensive, but as long as your engine isn't leaking it out, it will help in the long run. Synthetics also help when the weather turns cold--not sure what your winters are like there, though. The idea with the plugs is to burn as much of the fuel as possible, therefore improving the efficiency of the engine--this is why super-high voltage electronic ignitions have taken over from older styles. The $4 NGK's should work fine--higher dollar ones will make gains, but they're likely to be fairly small ones compared to the cost (you may want to get other opinions on this, though--I'm not on top of all the new stuff out there; something like Iridium plugs MAY be worth the stretch). On the exhaust, even a good system with the factory manifolds will help, as it will help the engine breath easier; but, if it's really that important to improve things, headers are a must for freeing up that engine. Now keep in mind, none of these things is going to make a huge improvement alone, and even together they may only make a slight difference overall, but if you drive a lot, it'll pay off. So much of fuel mileage comes down to how heavy our right foot is, and how aggressive we go through the gears. Take care, friend!

Ply refers to the 'layers' of material used in the tyre (think ply wood) More layers means more material which equals more mass. So a 10 ply tyre weighs more than a 6 ply therefore it takes more energy for the engine to turn the tire. Thereby using more petrol.

The spark plugs help with fuel efficiency because if they are working properly they are igniting the fuel better. Old, or dirty plugs dont ignite the fuel as well and can result in a loss of mpgs. Yes it is a good idea to replace spark plugs in an engine like changing the oil (except not nearly as often).

Hey Ben, not to change the subject, but seeing as how you're an Aussie, you might have first-hand info on this: what kind of reputation do T-Max and CSI winches have around there? I've been looking into them, and know they're some of your native brands--have you heard much about either, and if so, would you recommend them? They have great specs and features, things that Warn and other big names can't claim (like all ball-bearing construction, gear-locked drums, and higher hp ratings), and their prices are much more reasonable than "comparable" Warns or Ramseys. Any ideas?

I needed to seriously increase my MPG so I bought a 2001 Camry to act as a daily driver. If you can afford it that would be your best bet. My newish Camry gets 29MPG, has 82,000 miles and only cost $7,800 US.

I kept my 4Runner of course.

And if you wanted to get some serious speed out of your 4Runner you'd buy a turbocharged Supra, right (LOL)? While an entirely different vehicle is certainly capable of better performance in it's niche, I don't think that's the point of these discussions. It's a safe bet that someone on a 4Runner forum actually wants ways to improve his 4Runner. Just a friendly point--not trying to tick off anyone.

You know what BuckNutBob .. I really like your username.

Anyways, I just wanted to throw that out there because it really is a good option. Sure you can waste $$$$ trying to make your 4Runner more fuel efficient but it is a waste. The only goal should be to get it running great and if it is a V6 then you will only REALLY get 17-19 city/hwy.

A lot of T4R members have second vehicles. Hey a $1000 Geo Metro might not be a bad idea. Take the extra money you save on gas from that commute and pour it into your 4Runner.

Just saying ....

That's precisely why I just bought a motorcycle as a second form of transportation. That thing is going to get upwards of 40mpg and serve most of my driving needs.

Not much you can do to improve milage besides driving slow and easy like an old man, Get some highway tires with a smooth tread, like a passenger car tire, Take out all of those pesky extra seats, and interior extras that just weigh you down, or get a Toyota Camry.

BucknutBob, cheers mate. All good general advise that ill implement ;)