Originally Posted By: TiredTrucker
Originally Posted By: Doug Hillary
Hi,
TiredTrucker - You said this:
"Doug Hillary does make some valid comments in his article, but the scope of his arguments are limited at best."
Could you please elaborate?
I did in my previous post, in that the economics of the end user decision was not taken much into account. Maybe Porche has over 100 recommended manufacturers, most OEM's don't give such a broad selection. Jeep, regarding their Liberty CRD only gave 1 recommendation... Mobil 1.
I did state that OEM specifications on oils should be followed, but that a generic statement that only following OEM recommendations are fine for small quantity users, but are economically detrimental to higher volume users. This is of little concern to the OEM and blindly following a specific brand recommendation can be problematic. Especially when more cost effective, yet fully functional and reliable alternatives are available which meet a specification standard. Likewise, real world testing of how a particular oil is performing can help determine the best cost effective solution. Not that UOA's are a be all, end all thing. Stating that UOA's in and of themselves are worthless, may be correct. But in conjunction with the OEM minimum standard, they can be a valuble tool. It would seem from other responses, that some are being led to assume that UOA's are unneccesary and that blindly following only the OEM brand recommendation is the correct path. I have no beef with those that choose that path, but it can be economically unneccesary. This is why I stated that specs like the Cummins CES 20081 type of spec is a better way to go about it. Choose whatever brand you like, just so long as it meets the minimum spec of the OEM. this may include a brand that did not "pony up" to have the OEM put it on their recommended list, yet took the time to ensure that the oil does indeed meet a standard spec put out by the OEM.
This thread:
http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=1325382#Post1325382
May be of interest to you. It covers Doug's fleet testing of Delvac 1 over the course of several million Km in OTR transport trucks.