I was perusing the oil isle at the local walmart the other day and stumbled on 5 vintage quarts of pre-4T Mobil 1 5w40 turbo diesel oil for $2 a quart. I can't find and dates on the bottles but only 1 has the CJ4 rating, the rest are CI4. The bottles are sealed but well worn and scuffed like they're be shuffled around alot. Just in time to service my mower for spring.