wwillson
Staff member
All,
I changed the oil in my 97' Mercury Villager today at 100000 miles even. The van has been fed M1 from 1,000 to 80,000 miles, Shell Rotella 5w-40 syn from 80,000 to 98,000, and Mobil Delvac 15w-40 from 98,000 to 100,000 miles. I normally change the oil every 5,000 miles in the summer and every 3,000 in the winter. However, I changed the M1 every 7,500 to 10,000 miles. With M1 there never was anything in the oil filter. With Rotella I noticed a bit of sludge in the filter housing, but not very much. This time I ran Delvac 1300 and noticed that the oil looked very dirty after only 2,000 miles. I changed the oil and filter tonight and MUCH to my suprise, I found LOTS of sludge in the filter housing.
I'm guessing that the Delvac must have a add pack that is really good at breaking sludge loose? If you look at the pictures, you can see the sludge was very grainy.
http://ftp.linuxnirvana.com/~wwillson/filtercap.jpg
http://ftp.linuxnirvana.com/~wwillson/filterandcap.jpg
Any advice/comments welcome,
Wayne