Is how to write off gas on taxes a valid tax write-off?

Gas expenses are deductible when they are incurred for business purposes, such as driving to meet clients, traveling between job sites, or running business-related errands. To deduct gas expenses, you can choose between the actual expense method, where you track all vehicle-related expenses including gas, or the standard mileage rate method, which includes gas as part of the per-mile rate. The actual expense method requires detailed records of all expenses and the percentage of business use. Personal commuting and personal trips are not deductible. For example, if you drive your car 70% for business and 30% for personal use, only 70% of your gas expenses are deductible under the actual expense method.