Dragoon wrote:
http://clicks.aweber.com/y/ct/?l=85dF_&m=1kaSYN884U0Ojn&b=oO_qFeDsTZJ8Xk3lBQWR8g
As few of you know, i am a life member of the National Street Machine Association. I am also a member of the Master Bike Builders Association and am about to go through all of their grueling tests to get my full credentials. I have been building bikes and tuning VAG cars for 15 years now and have had two of the Audi's i did featured in Audizine. What you may know is that I am firmly in the Mobile1 fully synthetic oil believers and have been since the mid 80's. So i thought i would post this article that came to me today from the Custom Choppers news letter i get each day. I hope you read it and can make up you mind once and for all which oil works best for you, and I am not advocating synthetics nor is the article.
Let the verbal rape begin
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Dragoon,i have been involved in oil research/testing for another forum (Classic muscle cars) over the past 5+ yrs so have been in the thick it not counting my 40+ yrs exp wrecning bikes/muscle car motors too and see 1 thing they completely overlooked thats very imporant along with a 2nd not as important issue that also needs to be expanded on.
1) The big diff between pass car oil mfg'd today/2011 and bike oil is the pass car & most truck &7 many diesel oil too have greatly reduced zddp lvls in that are critiacl to protecting motorcycle motors from excessive heat(esp lrg air cooled v-twin like R*) which isnt for obviuos reasons.
Also,even more important if the fact that old school flat tappet cam'd motors like R* & HD hasve need the ZDDP protection to avoid premature excessive wear between lifter/cam lobe contact area which is a real issues.
That was a real problem for the FT cam'd muslce car motors and i have also seen at least 6-7 R* /RSC memebrs th at had lifter/cams wear out prematurly too over past 1.5-2 yrs too,it can & does happen!.
A good/safe zddp lvl for proter protection in air cooled R* motors is approx 1250-1300ppm as a safe minimum,amsoil MCV & Mobil 1 v -twin both full syn bike oil in 20-50 showed 1400ppm & 1700ppm zddp respectively in oil testing i rvu'd.
Most pass car oils mfg today have approx 700-800ppm zddp vs amsoil/mobil-1 bike oil @ 1400 & 1700zddp respectively so pass car oil has too little zddp for lrg air cooled ft cam'd motors.
Truck /diesel oil is a diff issue,not all have had the zddp reduced to unsafe lvlv for ft cams,Chevrons delo 15-40 std dino diesel oil has 1300ppm zddp verified thru my oil testing and also from the mfg too. Shells 5-40 full syn rotella also has 1300ppm zddp but both these oils have fric mods not being wet clutch friendly.
But not shells rotella 15-40 std dino that had zddp redu ced below safe lvl for ft cams.
And 2nd point is when it comes to friction modificers & wet clutches.
2) It used to be only the lighter fuel conserving oils with the star on front label that had fric mods in them ,well thats not the case anymore.
I contacted mult oil mfgs on that issue too and they all said most all of thier pass car/truck oils mfg'd today even in heavier grades like 10-40/15-40/20-50 also have friction mods in them too.
So its not just the lighter fuel conserving oils that the fric mods in them anymore per oil mfg's which was not addressed either.
But will someone running pass car oil with fric mods & low zddp alwyas have clutch slippage or prematur Ft cam lifter wear ,no not always!
If you rid 1 up on flat road,no bag loaded,no widnscreen,no per/power increasing mods you may be just fine.
But install pipes/
BAK/Jet
carb/ported intake/
dyna ign/maing for more power &trq,ride 2 up,bags fully loaded,run tall windscreen,often ride 2 up in hills/mountains / with bike fully loaded that thats when the fric mods can get ya in trouble even in bikes that are not known for have a weak clutch spring like we all know R* has from factory.
Also,as for FT cams/lifter running low zddp lvl ,if your bike/motor see's mostly over road driving with motor always at full oil pressure (70-80psi at speed vs 8-10psi @ idle) with little to no idle time & not overheating motor & oil often stopped in traffic /stop lights/stop & go traffic so no excessive heat then you can get by in some of those cases with minimal ft cam/lifter wear and have relatively no problems at all.
But ride often in high temps in traffic at times for more idling time at much lower oil pressure for greatly reduced oilig of FT cams/lifters or run perf cams with more lift & more agressive lobe design with higher valve spring rates creating a lot more friction between moving parts that are temporaarily getting less oil at idle while also being heated up more then normal and thats where have bike oil with the proper ZDDP for FT cams and air cooled motor is extreemly important to get the most yrs of problem free srvc.
The zddp sets up a temporary protective boundry layer between excessily heated up parts like lifter to cam lobe interface & rest of valvetrain parts,piston rings to cyl walls,wristpins to small end on conecting rods & where they seat in pistons,rod &
main bearings etc protecting them from scuffing/gailing/scratching /premature wear in that situation and thats where pass car/truck oil with low zddp lvl's can cause premature wear for ft cam'd /air cooled motors.
Scott
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