I have a Touring-L with about 4,800 miles on it and it shows 53% oil life and the panel. What is the expected oil change mileage? I am going to try a change using a vacummn extractor, and Pennzoil Ultra 0w-20 oil. Any thoughts? I bought the molar oil filters from RockAuto for $6.33 each and the oil from Ebay for $30.00 for a 5 quart bottle.