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| GM World Class Certified Technician |
HI there, Many owners of any car do not realize just how lousy todays fuels are. Fact is, the formulations by most fuel manufacturers barely meet EPA guidelines for keeping injectors and intake valves and combustion chamers clean. The first thing that an owner can do is to... |
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#20
By
ChuckG
on
10-25-2008, 08:42 am
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| Has anyone considered this: Top Tier may be a proprietary standard. Maybe it's one owned by GM and for which vendors must pay for certification, much like "Windows Certified". I've never heard that this was a certification from withing the petroleum industry. What I mean is that other gasoline vendors may have products every bit as good and with detergents every bit as effective, but they simply haven't paid to have their products Top Tier certified. Ford even puts an ad 'recommending' BP fuels on their gas caps. Does this mean Fords run better on BP than Chevron? I doubt it. More likely, BP simply paid Ford. I personally run BP or Mobil with no ill effects. I ran Shell, the only Top Tier available here in Michigan, but their stations are hard to find and they do business with Iran. |
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#22
By
JBsZ06 |
| Sunoco stopped ultra 94 up here and since it wasn't tier one grade (screws up fuel sending units on some cars etc) I now try and use shell gas.. Shell credit card knocks 5 percent off the price of every gallon on each months bill sent so what the hell.. Shell it is! Sunoco 94 was a cool way to go.. Your lucky you still have it available.. Happy holidays JB |
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#23
By
man00dude
on
03-22-2010, 11:51 am
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| Quote:
Will agree on this one. | |
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#24
By
DP77/00Vette
on
04-11-2010, 09:27 pm
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| I just discussed this with my mechanic. I have been using Amoco/BP in my two Vettes but have noticed my 2000's mileage has gone down about 3 to 4 mpg in the past 6 to 9 months. He suggested to use Texaco that doesn't have ethanol. Plus it has Techron in it. What does everyone think? Is Texaco, Chevron? |
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#25
By
c4c5specialist
on
04-12-2010, 04:06 am
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| Texaco is top tier certified for a higher level of detergency. Allthebest, c4c5 |
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#26
By
NORTY
on
05-21-2010, 12:22 pm
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| Quote:
The EPA sets regulations for various specifications. They then leave it up to the private sector to come up with ways to comply with those regulations. With regard to gasoline (or diesel for that matter,) the oil companies try to make the product as quickly and cheaply as possible. If gas station "A" where selling gas for X, and gas station "B" were selling better quality gas for 2X, gas station "B" would be out of business in a heartbeat. Even if proven that the gas in "B" got you twice the mileage, burned completely & got you a date w/ Sandra Bullock! Well, ok, maybe not the date, but you get my point! Since 100% gasoline doesn't comply with the EPA regs, the oil co's must add things to comply (or face HEAVY fines.) Remember when they added MTBE? It worked for the gas, but ruined or groundwater aquifers! Santa Monica is still importing 100% or their water because of this! That, and the exhaust was heavy in formaldehyde. Smog tests don't check for formaldehyde, so it passed. Now, the oil co's are using ethanol (ethyl alcohol) to add oxygen to the fuel. This makes jetting leaner since you're adding oxygen in the liquid side for carburation tuning purposes. Since our engines don't specifically run on oxygen, we get 90% gasoline and 10% oxygen that is then mixed with air for our intake charge. Since we get less energy/heat from ethanol (Btu's) than we do gasoline, we get less power from ethanol blended fuels. This is why our mileage goes down with the use of "oxygenated" fuels. All the States/ Fed love it because we buy more fuel to get around. They collect excise taxes on each drop of fuel we buy. It's like a hidden tax increase that you never know about... | |
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#27
By
NORTY
on
05-21-2010, 12:31 pm
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| Quote:
Shell was married to Texaco about a dozen years ago, then they divorced, then Texaco took up with Chevron. When Shell was with Texaco, the Compny name was "Equilon." For "upstream products'" Shell is married to Mobil, and their name is "Moteva." [canadianaccent]Kinda funny, eh?[/canadianaccent] | |
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#28
By
ChuckG
on
05-22-2010, 03:15 am
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| Quote:
My state (Michigan--home of the tax and spend and all its resulting goodness) collects all sorts of road taxes AND sales tax. Gas hits $5 a gallon their eyes roll back in their heads from all the new sales tax collected. | |
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