calguy

I recently switched to chevron gas to see if the gauge problem would get better, and it didn't.
I went through three tankfuls to see if the gauge problem would be fixed.
Even with my old gas, the gauge would only be erratic on a fill up, then after driving for ten minutes, the gauge worked perfectly.

The car got terrible mileage with this chevron crap, compared to union 76, which I have been using since I got the Vette 4 years ago.
Today I drove about 85 miles, and it used almost a quarter of a tank.
With union 76, going the same miles, the needle would just be coming off the full mark, and not quite to the 1/8th mark.

Needless to say, I am going back to union 76. You people can keep your chevron, it's crap, and also more expensive.

Bob.

.

redzg

That doesn't make any sense -- unless, of course, the Techron is having an effect on the sending unit or similar. Gasoline of similar chemistry, i.e. both are E10 and 93 octane, should have the same energy capacity. Proving actual mileage disparity would take more work than I would want to invest in.
That said, I tend toward Shell over here on the right coast.

foggy

Make sure you use the old school method to calculate your gas mileage.. The DIC can sometimes be way off... Plus with your sending unit not working correctly, it makes it worse.
The chevron that everyone is talking about is NOT the gasoline.. Yet the gas additive.
It's called Techron Concentrate. In the Black Bottle... IF your sending unit is saveable, it will
work.. But your unit could be beyond a chemical repair..
I would also take into account IF you are comparing gas with different amounts
of Ethanol in them.. You will always get worse MPG with ethanol..
Remember, these C5's were designed before ethanol was everywhere...
i try to avoid ethanol totally.. Especially for anything built before 2010

msandym

What do they do to the gas out there ? I use shell , BP , get consistent mpg . 15 around town , heavy foot , mid to high 20 highway . But consistent.

calguy

I even noticed it driving around town, that I was not getting the same mileage with chevron, as I was getting with union 76.
I suspect the techron is the cause.

Bob.

norcalace

Your right it's the Techron. Go back to Union 76 and you'll be fine. Case closed, problem solved, nothing more to talk about here.
Wait for it..........

Forcedvert

dbgoodwin

Vetteman Jack

If you haven't used the Techron Concentrate product, do so and see if the gas gauge straightens up. Many have reported positive results with it.

As for the gas mileage, the suggestion about calculating the MPG the manual way may show a much different result for you.

Yokesc5

Yello95

dear Lord that's funny...

Chevron premium with Techron is the best gasoline on the market...I used it in all of my vehicles, especially the Vette for 10 years until they pulled out of Virginia (Chevron is based in Kalifornia ...left wing snowflake BASTARDS)

mstromquist

Gotta be pretty patient when it comes to the techron. My gauge took about 6-8 months before it was working consistently after I started using it. Not sure what the problem with the mileage would be off hand.

Forcedvert

Old guy got bad gas won't be the last time I'm sure

Yello95

... Techron dissolves the sulfur on the fuel cards and bingo...
BTW...guess what dealerships use for the sulfur deposit problem on the fuel cards when people bring in their cars in with fuel gauge problems?.....its GM special sauce in their own GM branded cans...AKA...Chevron Techron...

Kingtal0n

Your car is probably un-optimized for economy to begin with. Many do not realize how much attention to detail it takes to max economy.

A 3000lb car with any V8 engine should be able to achieve a minimum of 25mpg at 65mph. that is an absolute min, with most in the 28-30mpg range. Gearing/cruise rpm is a big chunk of the equation. the rest is rolling resistance, drivetrain losses, and a small bit is tuning.

calguy

I have always gotten great mileage when using union 76, but with this chevron, it is terrible.
In an average month, I usually top off the take when it is 3/4 full.
I usually fill up two times in a month with 76.
I have already filled up three times in two weeks with this chevron.

I really think it is the gas, and not the gauge.
I tried the techron in the black bottle four different times, and it changed nothing.

Like I said(even with the chevron), once I drive for ten minutes, the gauge reads normally, until I get gas again.
With the 76, I get around 20 mpg around town, and 26 on the long hauls.

With this chevron, the gas seems to disappear with very few miles.
It reminds me of my R/T pickup.
That gets 12 around town, and 16 on longer trips.
This trip today in the Vette was like I was driving the pickup.
The car runs fine with both brands of gas,but there is a huge difference in mileage.
I will for sure be going back to the 76 gas.

Bob.

Ramets

Funny, MPG never entered my mind when I bought my C5. It's sort of like when I had my 40' diesel motorhome, and people would ask what the mileage was. You don't buy these vehicles for the MPG. You buy them for the DPQ. The "Driving Pleasure Quotient".

leadfoot4

Way too many "it seems to", and "it usually does", in order to get any kind of accurate comparison..............

Forcedvert

I’m sure “you” are the one to figure this out with a corvette that has a bad gas gauge.... Thank you for this important research.


Seriously..... try gas from another top tier brand so we can know what not to use, we have no 76’s anywhere here.

norcalace

That didn't take long. "Just when I thought I was out, they drag me back in". So let's do a little math. 20 mpg around town with Union 76 equals 2 fill ups a month. With Chevron you fill up 3 times in 2 weeks. That's 6 fill ups a month. So your 20 mpg on 76 is now 6.666 mpg or 77% less than before on Chevron.

In summation, there is nothing wrong with the fuel you are putting in your car. THERE'S SOMETHING WRONG WITH YOUR CAR!