Well I am pricing things out. At Autozone Mobil 1 is $7.49 a quart. 6 quarts comes to $45 or so not factoring in tax so add a few bucks there. The K&N filter for my 2010 GMC Savana 5.3L is $20.99...OUCH! FRAM is $5.69 A/C Delco is $4.19 Mobil is $12.99 ValuCraft is $2.99 IS THE K&N worth the EXTRA COST? or is a FRAM a good filter/good value?