If you're nervous about going 10,000 miles or more between oil changes, then do it every six months, when you probably should also have your tires rotated (also explained in your owner's manual). GM says to change your oil at least once a year even if the service indicator warning light doesn't come on.
Click on âFileâ and select âSave Asâ after youâve entered all data into the spreadsheet. Select âCSVâ under the âSave as typeâ dropdown menu. Type a name for your CSV file, then select âSave.â You have now created a CSV file, and commas will automatically be added to the file to separate each field.
Choose one of these possiblities: 1  Change the CSV file extension to TXT (when you open a TXT file with Excel it will start the text file import wizard where you can choose the delimiter) -- or 2  --. In your CSV file(s), use a text editor to replace all commas , with semicolons ; -- or --.