mexicanjoe
Full Access Member
Guys, I have been using Delo 15-40 for a long time in mu 89 n/a 7.3. I would normally add about 1 quart of oil every 750-1000 miles; due to oil leaks and the numbers of miles on the truck. Walmart brand was pretty good also, but when I had the chance to pick up Shell Rotella I jumped on it. Sad thing is : here lately Ive been using a lot more oil. to the tune of 1 quart per 500 miles! Is it the oil or maybe my CDR is bad?? Im not particularly worried but Id like to know if the change would cause this. Can anybody chime in and give me your opinions......