06 Silverado 5.3 with OLM. Driven about 7-8K per year by my wife. Gets in, no warm up, and goes. Vechicle is stock, except for a Flowmaster cat-back exhaust. 75% around town, 3-5 miles with little/no warmup. 25% minor highway driving, 10-20 miles, occasional long trips (100+). Kansas winters get to zero on occasion, and 90+ in the summers. Will ASL or SSO make it a full year (with EAo filter) under these conditions, or should I do shorter intervals? I know the OLM is better than a fixed mileage, but I much prefer a structured maintenance schedule vs the OLM.