I recently replaced the oil in my ATV and now I smell oil burning which it didn't before. I used automotive 10w30 full synthetic. I used the same oil on the previous oil change without issue. I had researched the oil before to decide if I needed to pay up for ATV oil and there were many posts that stated automotive synthetic oil would be fine. Now I'm not sure what to do. The only thing I did different this time was replace the filter cartridge rather than clean it and I believe it was the same brand of oil.