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Shell has one of the highest sulphur contents on the market. I avoid it like the plague.
GM actually has a bulletin out recommending Chevron and BP as the only makers keeping their additives within spec. Other automakers are also recommending these two per the same research. I use BP (so does the factory at Bowling Green) and add Techron when I can (techron is already in chevron gas).
Shell has one of the highest sulphur contents on the market. I avoid it like the plague.
GM actually has a bulletin out recommending Chevron and BP as the only makers keeping their additives within spec. Other automakers are also recommending these two per the same research. I use BP (so does the factory at Bowling Green) and add Techron when I can (techron is already in chevron gas).
Shell has one of the highest sulphur contents on the market. I avoid it like the plague.
GM actually has a bulletin out recommending Chevron and BP as the only makers keeping their additives within spec. Other automakers are also recommending these two per the same research. I use BP (so does the factory at Bowling Green) and add Techron when I can (techron is already in chevron gas).
It's on my eSi CD, which I don't have installed right now. If anyone has the updated electronic service manual for our cars, it was an addition in the past few years. Sory I can't be more specific, it takes quite a while to reinstall all 7 CD's. GM did some research with toyota and one other maker if I recall, and came to conclude these gasoline makers were the only ones whose additive profiles were appropriate for long term engine safety. It was basicly a plea to other oil companies to follow suit.
I've been using Sunoco 93 in the 95 Grand Am and the 97 Prelude, 02 Vette, they all run great on it. I have always used Sunoco and the mechanic is always impressed with the inside of the engine (tune up time).
Alcohol in v-power equals less energy/ worse mileage. There was a thread on toptier gas that says it is 10% alcohol.
From the Toptier website:
1.3.1.2 Base Fuel. The base fuel shall conform to ASTM D 4814 and shall contain commercial fuel grade ethanol conforming to ASTM D 4806. All gasoline blend stocks used to formulate the base fuel shall be representative of normal U.S. refinery operations and shall be derived from conversion units downstream of distillation. Butanes and pentanes are allowed for vapor pressure adjustment. The use of chemical streams is prohibited. The base fuel shall have the following specific properties after the addition of ethanol:
Contain enough denatured ethanol such that the actual ethanol content is no less than 8.0 and no more than 10.0 volume percent.
It looks like all top tier fuels have alcohol??? Maybe I read it wrong.
After my gas gauge crapped out, probably from Wawa gas, I switched to Shell and the gauge is good but mileage did drop by as much as 2 mpg. I'm going with Texaco with Techron and hope for better mileage.
I think I'm switching to Mobil, I mean it's just make sense since the oil my dealer uses is Mobil 1, why not use the same gas brand as my engine oil. I know that there mgith not be any relation, but I'm only getting about 15-16 mpg's whether I drive the car hard or not. Just does not make sense. I used to use Shell on my CRV and Durango and I also get crappy mpg numbers. Since I switch to BP Amoco, my mpg numbers went up and only about 1 mpg off the rated mpg use. BTW, don't get confuse, I'm using BP Amoco for my other 2 cars, I'm just switching to Mobil for my Vette.
interesting info & input. Funny how our cars have, apparently, sticking gas guages. Great cars, but Hey, It's only a Chevy, a neat Chevy, but.. They have got to have gas guages figured out by now. My Ford Model A (hence the name 28 Tudor) runs great on any old thing that smells stronger than beer! and the gas guage works just like a toilet float with a mechanical pointer, Hillarious. but foolproof.
i have been using chevron only since i started driving. not too long ago shell had a big problem in sough florida and everyones gas guages went bad when there was too much sulfur in the fuel. the car seems to like chevron the best but if i ever get stuck in a tight spot i buy the shell hell i pay the extra cent a gallon to drive across the street to get gas at the "new" station when another older chevron station is across the street.