I have almost always used OEM oil and filter for my rides. 2000 suburban 240,000 miles and do 3,000 OCI using ACDelco 5w30 and ACDelco filter. 2014 Lincoln MKX, just turned 100,000 using Motorcraft 5w20 synthetic blend and Motorcraft filter 5,000 OCI. Both types of oil are getting scarce in my local retailers and seem high priced online. Both cars take 6 quarts so the Havoline smart change seem to fit the bill for me. Would like input on what you folks think, both types of oil I need are available for pickup at Walmart. Full synthetic is $19.97 and blend is $15.47. The OEM filters are readily available usually around $4-5 and have plenty of those. But should I use the blend or go full synthetic? Thanks for any input!!