The 5.3L using oil is a very minor problem. My 2008 used about 1/2 qt every 5K miles. ALL engines use a little bit of oil between changes. GM has probably sold over 2 million trucks with 5.3L engines with AFM since 2007. If it was as huge a problem as people make it out to be, GM would have discontinued the engine. - - - Updated - - - I've never seen a Tahoe with a V6, as a matter of fact, I don't think Chevrolet has ever put a V6 in a Tahoe. - - - Updated - - - The 6.2L (L94) has AFM as well. The L9H 6.2L appears to NOT have AFM. The L94 engine is used in the Escalade. I cannot verify that the 6.2L in the Silverado has AFM or not.