14.7 - Page 2

rodeo02 · #16 04-20-2006, 06:49 AM

Tom, good point on the tires & tire pressures. My 2002 spec'd 26psig all the way around!

When gas hit close to $3/gal I bumped them up to 30-32psig. Marc, another huge MPG factor is the tires themselves. What brand/type of tire are you running. Aggresive tread tires suck for MPG's. I'd go for a good hywy tread tire. Synth motor oil wont increase MPG's for the 3.2L, but it certainly wont hurt. I saw a slight MPG gain running 5w-20 in my 2002 3.2L. She ran as smooth as butta on it as well. You can run GM auto trak II xfer case oil, but I wouldn't waste the $. You'd be better off with M1 5w-30 or 0w-30 in there. I'd concentrate on the tires for your MPG woes.

G/luck
Joel

marcre · #17 04-20-2006, 08:18 AM

I've got Nokian WR-SUV's for tires. They are six months old, so I can't replace them. The tread isn't real agressive, but they may hurt my MPG. I never thought of them hurting, but I bet it is possible.

rodeo02 · #18 04-20-2006, 08:46 AM

Marc, those are good tires. Pretty much rules that out. Just be sure to keep them aired somewhere between the door jamb label and the sidewall specs. I wouldn't go over the sidewall specs.

G/luck
Joel

marcre · #19 04-20-2006, 11:34 AM

maybe I will go above what the door jamb says. I'ver always kept them at 29psi. I will up it a little.

rodeo02 · #20 04-20-2006, 01:50 PM

Marc, I used to be the same way. Kept mine ~27psig for a long time (spec says 26). Didn't care for the tire wear or MPG's, so I went up ~4psig. You could safely go to 31-32psig on yours without issue. I'd see if that makes a difference for you.

G/luck
Joel

Ramblin Fever · #21 04-21-2006, 12:20 AM

FWIW - I run mine at 36 front/34 rear - works GREAT.

My tire psi is the biggest factor, on my truck for crappy mileage. My door jamb calls for 29F/32R, I ran that for the longest time, and got 14-16mpg as the standard for the 1st 4yrs I owned the truck.

Then someone 5yrs ago advised me to up them a bit, even as little as an extra 2-3psi REALLY helps, ever since then, if my truck drops back to 15-16mpg even on one tank, I double check the tires 1st.

I typically average at least 17mpg with running 36F/34R - haven't noticed any adverse wear on the tires, and I discovered that I like the handling MUCH better.

I've even been known for running 38F/36R if I'm doing a lot of highway driving where tires do better with a bit higher psi for maintaining cool running. This psi is too much for an unloaded vehicle though, I usually have quite a bit of weight and/or towing the boat.

Bet you a tank of gas that if you bring your front up to 35psi and your rear up to 32psi, your mileage WILL improve.

If you have P-rated tires, the sidewalls should be safely spec'd for 35-44 *cold* psi. Don't forget to check the correct psi BEFORE driving the vehicle for the day, OR 3-4hrs after having driven 3 or more miles.

If you do check them within a short time of having drove, just make sure to leave an extra 3-4psi OVER the psi you want to obtain for cold inflation.

Chromedubs165db · #22 04-21-2006, 09:25 AM

yes that is average for that vehicle. look at kbb.com and it will tell you

marcre · #23 05-08-2006, 12:29 PM

I upped the PSI from the recommended 29 up to 33-ish. I averaged 18.5 last tank. I was thrilled.

Ramblin Fever · #24 05-09-2006, 10:48 AM

Excellent!

marcre · #25 06-02-2006, 07:27 PM

after the bump in PSI's, I've been hitting 18-19.5 every tank. I may go a bit higher.

hshawn31 · #26 06-02-2006, 07:42 PM

I think I'm in trouble....how far can you guys go on a full tank? ( Trip odometer ) I can only go 240...and that was pushing it. Now I believe thats about 13 mpg...so now i have the worse mpg on the board!

marcre · #27 06-02-2006, 09:58 PM

Quote:

Originally Posted by hshawn31

I think I'm in trouble....how far can you guys go on a full tank? ( Trip odometer ) I can only go 240...and that was pushing it. Now I believe thats about 13 mpg...so now i have the worse mpg on the board!

give a little info about the truck and maintenance history. Year and engine size, any mods and is it 4x4?

Tom01Rodeo · #28 06-02-2006, 10:22 PM

Quote:

Originally Posted by hshawn31

I think I'm in trouble....how far can you guys go on a full tank? ( Trip odometer ) I can only go 240...and that was pushing it. Now I believe thats about 13 mpg...so now i have the worse mpg on the board!

Don't use the gas guage for figuring mileage, its very inaccurate, even the new one in mine isn't that great(but better than before). When the fuel light comes on, I still have around 5 gallons left, a quarter tank while the guage reads nearly empty.

Gizmo42 · #29 06-03-2006, 02:19 PM

I usually fill up when the guage reads 1/2 tank which is usually around 200 miles for me. I get around 15-16 mpg usually (I have a heavy foot). I need to get a new tire guage to check my tires. I think I set them to 32 PSI according to it but I think its lower.

The only reason I fill up at 1/2 tank is because this one is about twice the size of the one my mitsu had. Trying to avoid sticker shock

You should not let it get below 1/4 tank though. American fuel pumps (which isuzu used) tend to burn up without being surounded by fuel.

hshawn31 · #30 06-03-2006, 08:33 PM

I have a '95 rodeo 4x4 3.2L..... i never thought about the tire psi. I will check them tomorrow. Come to think of it i have never checked them, as i have only had the rodeo for 4 months. It has these brand new tires on them, Kelley's i think. The tread is sorta like a mud tread, but shouldnt hurt that much.
I may need a new fuel pump also...its hard to start in them mornings after sitting for at least 5 hours...

thanks guys!

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