From:	ken	e-mail:	kenlinuk@yahoo.com
Subject:	RE: ZDDP and Engine Oil	Date:	Fri Sep 14 05:07:24 2007
Response to:	1674

Hello Dave/Rob , I have used a diesel 15/40 oil for about a year now on my bikes and am happy to continue , diesels are harder on oils than petrol engines so must be better ?? , it performs well especially as they all have the orriginal all steel clutches , which free easily and quickly , no more problems with sheered keys on the mainshaft !!! I found an interesting , if not anorack-ish article on oil , see the attached web site , I run oil filters on my bikes too and still change oil about every 1000 to 1500 (max) miles , Rob isn't Rotella T a fully synthetic ?? no good for all steel clutches ?? Happy riding all , Ken http://motorcycleinfo.calsci.com/Oils1.html ----- ORIGINAL MESSAGE FOLLOWS ----- I've read a bunch recently about ZDDP and the recent ~75% reduction of Zinc and Phosphorous compounds in regular motor oil. This is causing premature wear in flat tappet engines. See: http://forums.noria.com/eve/forums/a/tpc/f/616604995/m/3011052071 Some of the specialty racing oil makers like Redline have synthetic oils with lots of ZDDP & stuff, but I don't want to go synthetic. How about the diesel-rated oils? I spotted Chevron Delo 400 LE 15W-40 in a local Pep Boys (no, they don't have the match books anymore). I called Chevron, and they knew the problem and recommended the Delo 400 LE for older flat tappet engines. They said the "LE" was made specifically for the ultra low sulfur diesel road fuels mandated in 2007 - but either the Delo 400 LE or regular Delo 400 would be fine for this application. Anyone have any experience using diesel-rated oils in old motorcycles? Do you recommend this? Dave