Pics? I have a locking cap mostly to keep stuff from getting into my gas tank whether than stuff coming out of it.

 

I was seriously considering locking gas caps too...but y'all make some good points about losing some gas bein' better than damage done to the vehicle itself.

 

I've been using a locking gas cap since the mid 80's.

Just to keep people somewhat honest; from syphoning to dumping sugar inside the tank.

 

im gonna buy both. Go down to a locksmith. Have him change it to where both caps work on the same key, and go from there.

BTW i have dual tanks.

Goose

 

A_G, you may be able to buy a dual gas cap set, keyed alike.

I thought I saw them a while back.

 

Stant makes them in a double set, using the same key. I bought a set last year. They work fine, not too expensive at all. I bought mine from Autozoo.

 

That would make sense for trucks with dual gas tanks.

EDIT: Anyone here use "Stant's InStant Fill Cap"?

 

Here's a little story for you all. At work we keep an old Dodge dump truck laying around just for hauling crap out to the dump. It has a gasoline v-8 in it(not sure what size). We noticed that the tank was starting to get pinholes in the top of it so we planned on replacing it. About the same time we also realized that one of the employees was siphoning gas out of it. We weren't sure who, but we knew it had to be an employee because the truck stays locked in the yard and its near impossible to get over the fence. After talking about different ways to catch the thief(s) I came up with a cruel idea. We put a 5 pound bag of sugar in the tank then I squeezed a tube of valve grinding compound in the mix. We topped it off with fresh gas and waited. Two days later my boss noticed the truck was down to a quarter of a tank. Cool. Somebody got about 20 gallons of my special brew. About a week after that one of our laborers blew the engine in his car. Coincidence? Right. We couldn't fire him for stealing the gas ( no proof ), but he did go for other reasons. I always wondered if sugar really worked, thats why I added the valve grinding compound. Thinking back though, I'm surprised the grit didn't clog up the fuel filter. We replaced the tank on the dump truck and have had no more fuel theft. No locking cap still...

 

surewhynot, I think Myth Busters proved that sugar in the tank was a myth, but the combo that you used, sugar and valve grind compound, probably cost that ex p.o.s. employee a lot more money than what he stole.

 

I always wondered about the sugar being a myth. I knew the valve grinding compound could do some damage if it could get through the filter somehow.

 

It could be that he was too cheap to buy a fuel filter, so he probably tossed it out and by-passed it with a piece of tubing.

Just a wild guess.

 

I work in the heavy truck/trailer business and have learned one thing: if someone WANTS to steal the fuel in your tank, they WILL....

Just my 2 cents worth...
Glenn

 

I haven't see mythbusters, but I tried it myself. A 2lb bag in about 3gallons of gas, in an old Mazda 323 1.6.
Didn't do anything... Mind you, that car was one tough nut.

 

My cousin told me to use mothballs as they will dissolve and mess things up in the engine, any truth? Not to be hijacking a thread.

Also, I have locking caps on both my tanks in the truck. They are like fences around yards and locks on car doors. To keep honest people honest. Our neighborhood had been hit by a group of kids syphoning gas and putting stuff in the empty tanks afterwards. They got to my truck and tried to get in but couldn't, becuase it took them too long, the neighbor next door noticed and stepped out onto his front step with the old mossberg 12 guage.

 

I thought Myth-Busters "busted" that myth on moth ***** ruining the engine.

I could be wrong.