How to Choose the Right Replacement Gas Cap

A gas cap seems insignificant as far as automobile parts go, but it's a key part of your automobile's emission control system. Choosing the right replacement cap helps everyone breathe easier.

Difficulty: Easy

Instructions

Things You'll Need:

• Automotive Repair Manual
• Gas Caps

1. Bring your car's year, make, and model with you to the auto parts store.

2. Check a reference manual or a supply store's computer database for the type of cap your car needs.

3. Select the type of gas cap specified. Don't substitute another kind, even if it looks and feels OK.

Tips & Warnings

• Don't drive around without a gas cap - it's unsafe for you, your car, and the environment.
• The closed-fuel system of a new car reduces pollution by forcing vapors into a recovery canister. Pick the wrong cap, and you'll end up with vapors escaping. A snug feel is not enough. Even a gas cap that goes on readily and doesn't wiggle can have an imperfect seal.

[shellydintexas]

on 8/22/2008 Does it affect the gas mileage? Doese it evaporate if it's not the right one?