If a napa filter starts with a 1,7 or 8 just add a 5 and it is an oil filter. If it starts with a 2 or 6 add a 4 and it is an air filter. If it starts with 3 than add another 3 and it is a fuel filter. Napa filters are just Wix filters in a Napa box. (Message edited by polarbill on June 12, 2008)
|