quote:Originally posted by Deltona_Dave:quote:Originally posted by Deltona_Dave:
I just pulled the rocker covers on my 2002 Craftsman Riding Mower/tractor (made by American yard Products AYP). Engine is a B&S 21.5 HP vertical shaft. Engine has 1200 plus hours on it. Never saw Synthetic OCI, except for one Mobil 1 top off. This old girl has had B&S oil factory fill, AAP 20w-50, GTX, Warren convenience store oil, etc. All has met API SL minimum. Last change was Rotella 15W-40. Current fill is Delvac 1300. Filters were either B&S or MotorCraft 400S.
Here is a link of the engine.
Remember, this is an air cooled Briggs Intek V-twin full pressure lube. It sees 25+ hours a month in very dusty conditions.
http://www.bobistheoilguy.com/...=1861000#Post1861000
Dave
Capt. Kirk, Prove to me about Sludge again......
This thing has only had dino (mineral oil) on the average of every 100 hours.
Dave
Just thought I should add that small engines don't have high tech sophisticated emission systems like cars do... further stressing the oil. Car engines are also plagued with short trips,incomplete warm ups,condensation and so forth that all contribute to oil oxidation. Small engines will run hot and burn off VOC'S ,condenstation,and fuel intrusion. There exists no possible coolant intrusion into the oil in those small air cooled engines to boot.
The small air cooled engines do run the oil to higher temperatures compared to water cooled engines which can pose another set of possible issues in some cases!!
However,this is daves real story,
I have an 8 year old Craftsman (AYP) heavy duty lawn tractor that is developing some sludge/varnish. Last season, it was filled with Rotella-T 15W-40 HDEO. Well, it don't like thick oil. It burned it at about 8 oz. per week (10-12 hours). Now that I am a BITOG'er, I want to clean her up and thought about this method:
So,the engine DID AT ON TIME.......HAVE SLUDGE....MAKING THE STORY A LIE
THE PROOF WITH A LINK
http://www.bobistheoilguy.com/...wflat&Number=1829761
KIRK