Rick, this engine oil topic is beat to death here and other boards but the fact is no oil has more than 1% ash now CF is the rating now Delo 400 is the same oil now as Delo 100 and the guys are telling you not to use any oil with a S rating and that is wrong in the Detroit book it will tell you can use it.The Delo will have a rating on the can CF/SL.I have owned 2 strokes for years and never bought into the idea that Delo 100 was the oil invented for the 2 strokes.Do your research and you will find out that any straight w oil will work that is on todays market good luck
... the engine oils of today have less than 1% ash per EPA and will have no ash after 2010 read a Delco 400 jug and it will state meets all CF ratings on the 40W and CF-4 for the 15-40.
And perhaps some relevance... what busnut is going to put the mileage on that it's going to matter whether they get 200 000 miles, or they get 500 000 miles, out of the engine?
APPLICATIONSChevron Delo 400 oils are mixed-fleet motor oilsrecommended for all four-stroke gasoline dieselengines operating under severe service and subjectedto wide variations in climatic conditions.
APPLICATIONSChevron Delo 100 Motor Oils are recommended for usein two- and four-stroke diesel engines in farmmachinery, construction equipment, marine, and otheroff-highway applications.
comply with Detroit Diesel Corporation twostrokeengine recommendations, including the0.85% ash maximum limit for Series 149 engines.