Originally Posted By: revelation9985
Bill, I just spent one more Hr. trying to find this article. To be frank, I'm more then [censored] I can't find it for U at this moment.I will do my best in finding it. If I don't find it for you disregard it. I know what read though. U do know that toyota has indeed listed engines that are prone to sludging right?? I will search over this week for it. If I cant list the article here on bonistheoilguy then forget it, but be aware of the problem.
I am FULLY aware of the letter that Toyota sent out identifying the engines and the models of the "sludge" engines. They ALSO stated in that letter to FOLLOW the RECOMMENDED OCI stated in the manual. Nothing about syn oil.
Most people operate in severe service and in the manual that OCI was 3,000 miles. The normal service was 7,500. In 2005 it went to 5,000 miles no matter what service you do with conventional oil.
Most people (like the member here who bought a Focus with "5k ocis which were more likely 7,500) don't follow the manual. Many of the vehicles brought into Toyota had 20 some odd thousand with the FACTORY FITLER STILL ON! They swore up and down that they changed their oil every 7,500 miles. Toyota still took care of them.
Don't worry about it. I've been here many years and seen a lot between the site and in real life. But hey, what do we know. We have members who have just shown up and they know it all.
Originally Posted By: Mustang Man
Originally Posted By: Oregoonian
My last change was at 7,500...and the oil was almost as clear as when I put in in (no more sludge).
IMO, this proves, at least to me, that synthetic is a superior sludge and engine cleaner.
Speaking of...
Still have not spent much time reading through the board and learned anything?
Bill