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David K
Honored Nomad
Posts: 64858
Registered: 8-30-2002
Location: San Diego County
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Mood: Have Baja Fever
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| Quote: | Originally posted by tripledigitken
I'd be curious how many have experienced a "pinging" using Mexican gasoline, and what was the vehicle.
Even running my 1991 Honda fuel injected m/c using regular I had no adverse effects, pinging or reduced power.
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No problems with my vehicles since they ended selling that 79 octane Nova from the 1970's and 80's! Magna Sin (87 octane) works as good or better than
the stuff sold in California. I get better mileage on Pemex too! (pure gasoline, no 'green' junk mixed in).
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TMW
Select Nomad
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Registered: 9-1-2003
Location: Bakersfield, CA
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The vehicles computer would reset to the default values but once your running again it would start making adjustments. Besides when you disconnect
your battery you'll lose your radio presets and in some cars like my wifes Acura you need a code to get the radio to work again. That cost me $50 the
first time it happened, used car and previous owner couldn't remember the code.
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woody with a view
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Location: Looking at the Coronado Islands
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Mood: Everchangin'
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| Quote: |
try a full tank of Premium and see:
A) If fuel mileage improves.
B) If the engine is more responsive when accelerating to pass, pull a hill, or coming out of a corner, etc.
C) If the engine operating temperature is a little lower, especially under load.
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a-i usually get around 14.5-15mpg in baja, loaded down and trying to drive reasonably. that's within 1-2 mpg of NOB on a modern interstate.
b-premium SOB haven't really noticed a difference.
c-i run a scangauge with mpg/atf temp/coolant temp/intake air temp on the display. how many degrees lower temp would you expect to see? my tundra
runs, on average, around 195 and gets up to 205 for short stretches, but alwatys returns to 195-ish quickly.
the price of premium SOB is less than regular NOB so i used to "splurge". i don't really notice any benefit.
edit: i'm headed south in the morning, this time we are traveling very light so i will try premium one more time to see if there is any difference in
my setup.
[Edited on 1-6-2011 by woody with a view]
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TMW
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Registered: 9-1-2003
Location: Bakersfield, CA
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My 04 GMC temp gauge sets one notch below 210 which I assume is 205 and never moves after it's warmed up. Winter, summer, AC on in the desert doesn't
matter, even when it idles on a hot day. Only time it moved was on a trip to CO and it cost me $2800 for new heads at 108,000 miles.
I got a friend with two Ford Mustangs a 98 and 08 and he says when the people change his oil and put in reg oil his temp gauge goes up on both cars.
He takes it back and makes them put in syn oil and the temp comes down. Doesn't happen often but his temp gauge knows when.
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DavidE
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Location: Baja California México
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Mood: 'At home we demand facts and get them. In Mexico one subsists on rumor and never demands anything.' Charles Flandrau,
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You might want to consider the fact that "two types" of Magna are available and it depends where you are as to what you'll end up getting. Just about
every last drop of Magna in Baja north is USA origin fuel. Most of the Magna in Baja Sur is barged over from Topolobampo to Pichilingue and is of
Mexican refinery origin.
What I see missing in this discussion are the very vital additive package that refiners in the USA add to their gasolines. The makeup of the additives
includes antioxidants, MDA (Metal Deactivators), phosporous, manganese, and ether esthers. Some US refiners use Ethyl Corporation's "Hi Tech 2000"
while Chevron arrives at its own proprietary "Techron" additives both as a component and as an additive.
Mexican fuel does not contain many of these additives, and if so, in substantially less potent mixtures.
Motor vehicles that would suffer preignition and detonation on Mexican fuel would suffer a similar fate on their US counterpart, be it regular or
premium.
It isn't a big secret that use of Mexican fuels covering many thousands of miles can lead to cold operation and driveability issues. This is true of
all Mexican fuels and it is due to the lack of an additive package.
In my own case I have found that adding a bottle of Chevron's Techron, occasionally reverses the degradation of driveability and economy and does so
for a few thousand miles. Preignition is one thing, and cold start stalling and stumbling plus a twelve to fifteen percent decline in fuel mileage is
another. My motor vehicle spends years, and more kilometers than I care to count south of the border. I find it interesting that the vehicle has
almost a hundred thousand Mexican kilometers on the odometer with the same fuel filter.
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Bob and Susan
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Location: Mulege BCS on the BAY
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remember shell texaco and chevron are the SAME company
and gas stations sometimes buy from "gas brokers" who "blend" their reserves
you really never know WHAT you are truly buying
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MrBillM
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Chevron Corp and Royal Dutch Shell ?
The SAME company ? What's the reference for that ?
Chevron and Texaco merged some time ago.
Mobil and Exxon also merged.
Chevron and Shell ?
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DavidE
Ultra Nomad
Posts: 3814
Registered: 12-1-2003
Location: Baja California México
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Mood: 'At home we demand facts and get them. In Mexico one subsists on rumor and never demands anything.' Charles Flandrau,
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Jeez, I'd better rush over to Point Richmond (Chevron) and Martinez (Shell) refineries and tell them to fix their signs. Base gasoline stock is indeed
traded back and forth. It's the additive packages that are the primary difference in different brand US gasoline. Chevron said it does not ever sell
gasoline with the Techron additive on the wholesale market.
Off-spec gasoline can be just much inferior before federal emissions guidelines step in and force refiners to send it back to the cat feed
hydrotreater.
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Bajahowodd
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Location: Disneyland Adjacent and anywhere in Baja
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Not looking to "pile on", but Chevron and Shell are completely separate entities. As for Texaco and Chevron, do any of you folks still see Texaco? In
my neck of the woods, Texaco disappeared. ARCO is BP. 76 is Conoco-Phillips. How long before there's just one company?
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BajaNomad
Super Administrator
Posts: 4999
Registered: 8-1-2002
Location: San Diego, CA
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I presume confusion comes from this:
1997:
- Shell and Texaco merged their western and midwestern USA marketing and refining business into a new venture called Equilon.
- Shell and Star Enterprises (a joint venture of Texaco and Saudi Refining) merged their eastern and southeastern USA marketing and refining business
into a new venture called Motiva.
2001:
- Texaco and Chevron merge into ChevronTexaco. Texaco is required (and does) divest itself from the Equilon and Motiva ventures.
- ChevronTexaco licensed the Texaco brand to Equilon and Motiva through June, 2006 (essentially) - which gave Equilon and Motiva time to rebrand their
Texaco stations to Shell.
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Bajahowodd
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Registered: 12-15-2008
Location: Disneyland Adjacent and anywhere in Baja
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You da man on this topic. But, at the end of the day, it just seems to me that all this merging and rebranding crap is orchestrated by accountants to
(either or both) drive up share price and avoid taxes. JMHO
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tripledigitken
Ultra Nomad
Posts: 4848
Registered: 9-27-2006
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| Quote: | Originally posted by Bajahowodd
You da man on this topic. But, at the end of the day, it just seems to me that all this merging and rebranding crap is orchestrated by accountants to
(either or both) drive up share price and avoid taxes. JMHO |
Which makes the companies more profitable and our 401k's more valuable! After 2008-2009 a growing 401k is a welcome change.
(I know some only have "socially conscious" investments.)
Ken
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DavidE
Ultra Nomad
Posts: 3814
Registered: 12-1-2003
Location: Baja California México
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Mood: 'At home we demand facts and get them. In Mexico one subsists on rumor and never demands anything.' Charles Flandrau,
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Yeah and I guess when Derr PArk Texas Shell and Pemex went joint venture their enterprise can be called PERMATEX.
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