Perfect you saved me time and money!!!In a car, I believe they are rated for 100,000 to 160,00 kms.. I have had them in my sled for the past 40,000 kms. with no issues. So, I think you would be wasting your time and money in replacing them at this point. Buy some when they are on sale, and keep them with your sled. Some 2-stroke may need them on the trail.![]()