l2vette

Just curious if anyone uses any type of fuel additive in their C3 Vette?
I have a 1972, completely stock 350 CI motor and was wondering what others have done, if anything.
Thanks in advance!

MelWff

1972 is a low compression motor. You do not require any kind of additive.

suprspooky

I agree you shouldn't need an octane booster (if that's what you meant by additive), I use Stabil for winter storage. I have had carb corrosion from long term octane boost usage (probably related to the amount of time a typical C3 sits unused as well) so I don't recommend using the stuff.

Goody

Modern fuels do not require additives as they have plenty of detergents in them to keep the valves clean. Older vehicles that are rarely driven would benefit more from finding fuel sources that do not contain ethanol in them.

Dusky

Lead substitute in mine.

Buccaneer

What kind of additive are you talking about, performance, gas stability etc...? If your motor is stock, you shouldn't need any octane boosters.

3X2

I use 100 octane unleaded. This may not be cost effective at $7/gallon if you drive a lot.

stingr69

I keep a bottle of Torco in my trunk for times when I can not find any 93 octane gas. Not for my C3 but for my 2010 SS supercharged Camaro. The stuff works.

Redvette2

No...don't use anything. Fortunately with the weather here in Southern California the car never sits more than a few weeks. If I was to have to store it for a long winter I might use a Stabil type product to help keep the gas and carb. cleaner.

Redvette 2

l2vette

My concern is I live Kalifornicate!
We have a special fuel (not to mention the price) that has a gasoline formula that changes twice a year, from a winter recipe to a summer blend designed to retard evaporation during warm-weather months.

MelWff

Same for the East Coast, again you dont need anything.

Buccaneer

Sounds just like here in Arizona, but I only put some Torco in the tank when I go to the track for some cheap insurance, otherwise not needed here and 91 pump gas works.

l2vette

Thanks for your responses!!

3X2

I'm more concerned about the ethanol that's in the pump gas which is why I run the 100 octane unleaded in my 427.

Kacyc3

Not sure where home is for you but you should download the puregas app on a smart phone and it will tell you what pumps sell regular gas without ethanol.

3X2

I live in the pothole capital of the country- Pa. For the 100-200 miles a year I drive, $7/gallon doesn't won't bankrupt me. If the racetrack wasn't dso far, I prefer to use the $14/gal 112 leaded. I even run the 100 in my snowblower.- at least what I don't use in it, goes into the cars in the spring.
Thanks for the tip. I'll look into it.
Mark

cottoneg

Knowing your compression ratio would help. Mine was 11 to 1 (plus a bit for a cleaning cut on the heads). I took the motor apart and there was detonation damage.

MelWff

What total mechanical advance are you running?