7500 miles on the Tacoma or every 6 months, whichever comes first using M1 AFE 0W-30 and either a TG or XG filter.
5000 miles on the Contour, regardless of time/months, using QSGB and a Motorcraft filter, it's a cheap DD so it doesn't get anything fancy.
5000 miles on the 7.3 Powerstroke, regardless of time/months since it sits around the most and is hardly used. Can usually go 2 years on an OCI, using Rotella T6 synthetic and a Fram OCOD filter, which is one of the few orange Frams that has metal end caps, but lacks the sure grip on the end which is kinda inconvenient for removal. Filter tends to be a bear to remove due to heavy towing creating vacuums inside the engine that sucks the filter to the mounting surface really tight. This is a problem with all diesel trucks but the 7.3 seems to be the worst with it! Next oil change I'm taking it to someone, last time I threw my back out trying to get the filter off.