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Author: Subject: Your Opinion Of Your Vehicle's Performance Using Pemex Gasolines
dtbushpilot
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[*] posted on 7-4-2012 at 09:57 PM


I just drive the damn thing, no noticeable difference



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[*] posted on 7-4-2012 at 10:09 PM


Quote:
Originally posted by thebajarunner
Anyway, the question I would like answered, is simple.
Where does Baja Norte get its gas?

My guess- it is US gas without all the California crapola


You would be correct.

http://forums.bajanomad.com/viewthread.php?tid=49406&pag...




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[*] posted on 7-4-2012 at 10:32 PM


No noticeable difference in my 2004 Tundra.

But, the check engine light comes on as soon as I run my US gas low and fill up with Magna. The code I get is a catalyst efficiency code.

Check engine light goes off after a few tanks of US gas.




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[*] posted on 7-4-2012 at 10:49 PM


I drive a diesel, so other factors apply, and my mileage is lower on Baja diesel, but I assume that is because the driving conditions are different. There are not many topes on I-5 or H/W 99 and I am not on and off the pedal constantly as I am going through the curves of Mex-1.

As for performance, I don't perceive any difference, but my 2003 Duramax would probably do OK on used vegetable oil for the light loads I put on it.

I've driven a half dozen gas vehicles all over mainland Mexico since the leaded days (those were red tanks, eh?) and I never had a problem with Mexican gas.




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[*] posted on 7-4-2012 at 10:59 PM


Quote:
Originally posted by Curt63
No noticeable difference in my 2004 Tundra.

But, the check engine light comes on as soon as I run my US gas low and fill up with Magna. The code I get is a catalyst efficiency code.

Check engine light goes off after a few tanks of US gas.


You can 'reset' the check engine light by disconnecting your battery for a few minutes, and then reconnecting it to see if it comes back on...




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[*] posted on 7-5-2012 at 08:13 AM


Runs just fine. It's a TOYOTA!
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[*] posted on 7-5-2012 at 08:47 AM


I get at least 5-10% better mileage on Pemex fuel (Magna). And I am usually hauling around 100s of pounds more weight than I do while at home, so it might be even better. The best mileage I got (25mpg) was on Pemex fuel when my 1996 Tacoma was new.

I always get a Check-Engine-Light that says there is an "issue" with the oxygen sensor in front of the catalytic converter. Goes away once I get home and put USA gas in it.

It does not seen to run any different, than I can tell. Does not matter what Pemex station I use.




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[*] posted on 7-5-2012 at 10:11 AM


...I drive an 80's toyo van,,did perceive pinging and lesser mileage while in mexico.....it's hard to get a handle on mileage differences though,,very different driving styles in mexico,,with lots of little offroad sidetrips--very different driving from stateside
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[*] posted on 7-5-2012 at 10:16 AM
toy van


THat van has the hardest motor ever made to get access to !!
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[*] posted on 7-5-2012 at 10:37 AM


We run Roja when we can get it. Better performance in all aspects, fuel economy and hp output. The extra few pesos a tank doesn't seem to interfere with the cerveza and comida fund. :lol:
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[*] posted on 7-5-2012 at 10:38 AM


Quote:
Originally posted by Bob H
Quote:
Originally posted by Curt63
No noticeable difference in my 2004 Tundra.

But, the check engine light comes on as soon as I run my US gas low and fill up with Magna. The code I get is a catalyst efficiency code.

Check engine light goes off after a few tanks of US gas.


You can 'reset' the check engine light by disconnecting your battery for a few minutes, and then reconnecting it to see if it comes back on...


don't do this. get a simple code reader at VatoZone/Oreilly's and read, then clear the code(s). otherwise your computer needs to relearn fuel curves and 1 or 2 million other data points, all the while your MPGs suffer.




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[*] posted on 7-5-2012 at 11:08 AM


My experience with Pemex includes diesel in my H1 and a LOT of aviation gas in a variety of airplanes. I saw no difference between performance on Pemex and NOB fuels.



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[*] posted on 7-5-2012 at 11:56 AM


I don't notice any difference now.

20 years ago yes, my trucks would ping going uphill on Mexican gas.

The only problem I have now with PEMEX gas is that at some stations I have to fill real slow or the pump stops as though the tank is full. I had to give up at the PEMEX at Los Pinos the last time and fill up in El Rosario instead. It never happens in the states nor at most other PEMEX stations.

Anybody else have that problem?




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[*] posted on 7-14-2012 at 02:27 PM


Premium seemed to be what my 2000 Nissan Truck liked best and it ran great the whole time...the gas overall was less expensive than the U S (like most everything else)
I did get an oil change in Southern Cal and the air filter was black..but that could be all those dirt roads my truck traveled...
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[*] posted on 7-14-2012 at 02:46 PM


Quote:
Originally posted by SFandH
The only problem I have now with PEMEX gas is that at some stations I have to fill real slow or the pump stops as though the tank is full. I had to give up at the PEMEX at Los Pinos the last time and fill up in El Rosario instead. It never happens in the states nor at most other PEMEX stations.

Anybody else have that problem?


yes, but mine does it NOB....:mad:




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[*] posted on 7-14-2012 at 03:08 PM


Absolutely no difference in the 30years I've been bumming around Mexico.



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[*] posted on 7-14-2012 at 03:25 PM


Wow, I like the idea that I might be getting better mileage from Pemex gas! And with their uncanny ability to actually be able to put about two more gallons in my tank than it holds, I'm like livin' large!!



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[*] posted on 7-14-2012 at 03:26 PM


The red, green, and yellow dispensers:

Gasolmex

Mexolina

Cien

All of which disappeared I think some time in the late sixties. The least expensive fuel was 78 octane. Pemex Cien in the yellow pump at the time cost the eqvt of 45 cents US per gallon when regular gasoline in the states was thirty one point nine cents a gallon. Could not find it south of Tijuana, or Juarez. Nogales did not get it until 1968.

We used to joke that Gasolmex forced a person to retard the ignition timing so far to reduce knocking, that you had to start the car on Friday to go shopping Saturday.




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[*] posted on 7-14-2012 at 04:53 PM


SFandH and Woody,

There are a couple things that may be happening to cause the nozzle from clicking off prematurely. If this happens consistently everywhere, then I'd say it's not a problem with the fueling equipment, but rather something in your tank design causing the clicking off to occur (sorry, not blaming you. I actually doubt this is the case, as all auto manufacturers know about the the needs of a nozzle and wouldn't want all their Tundras clicking off every time they were fueling). There are big differences in the way fueling occurs north and south of the border so this is a complicated issue.

Generally the clicking off is due to the following reasons:

1. The vapor return portion in the hose is clogged with fuel. This occurs when the previous customer tops off his/her tank for too long. The tank is full and because of the tight seal with the faceplate of the nozzle to the cars tank, the gas being dispensed has nowhere to go but back into the hose. The hose is coaxial meaning it has two compartments - one for gas and one to collect vapors. By topping off repetitively, the fuel stats clogging the vapor return line, which can cause a nozzle to click off prematurely. I sometime laugh at those topping off for 2 minutes because all they're doing is paying for gas they aren't receiving, or I enjoy them disconnecting the nozzle from the tank and having gas go spraying everywhere out of the hose/nozzle. It's actually dangerous, so I don't laugh much.

2. All nozzles are equipped with automatic shutoff. When the sensor on the spout of the nozzle detects liquid, it shuts off, thinking the tank is full. If this sensor is not functioning correctly, it can cause the nozzle to click off prematurely.

3. Could be something wrong with the insertion interlock mechanism on the nozzle. The bellows need to be compressed for fueling to occur. A defect could cause the nozzle to not dispense (or worse, dispense when the bellows aren't compressed).

4. The nozzle ain't pushed in all the way. Don't be afraid to stick it in deep!! =)

Again, big difference in equipment north and south of the border so this is a general statement on my part.

My $.02. I probably didn't answer anything................as usual. =)

[Edited on 7-14-2012 by ateo]




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[*] posted on 7-14-2012 at 06:11 PM


there is a known issue with the filler neck on my 03 Tundy. some have replaced theirs with good results. being the cheap bastard that i am i stand there and hold the nozzle while filling.....



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