This might be just a hypothetical question, since I'm not sure what I will do. I'm thinking about running regular high-quality 5W-20 in my Honda CR-V. Normal Service = 10,000 miles/1year Severe Service = 5,000 miles/6months. For the sake of argument let's assume that these recommended intervals for the CR-V are 'reasonable' for a long engine life. Should I use MONTHS instead of MILES to vary my drain intervals on the CR-V...like a poor man's Oil Life Monitor? For my use, the only 'severe service' factors that might apply would be 1) short trips and 2) de-iced roads. Would it make the most sense to just change the oil every 6 months (Apr and Oct), assuming that I traveled <10,000 in that 6-month time period? I figure that if I rack up 7500-10000 miles in 6 months, I'm doing plenty of easy highway miles. Likewise, regardless of mileage...after 6 months of cold, salty winter it's time to change. What do you think?