My 2017 CVO has 18000 miles [ 2 5ooo mile highway trips Illinois to San Diego ] you know i ran some full tanks of gas and altitude changes and 85 mph stretches no sump yet.
I don't know what makes some bikes sump and other not sump bit i am damn interested to see what Heatwaves 4 th motor does by end of summer.

from previous post............. Last sump was a brand new 2018 CVO Street Glide completely stock with 167 miles. Two days old. The Milwaukee rep wants to fix this bike. I had it two days and Harley has now had it for two weeks now. ..............................So this bike sumped never having gone over 3000 rpm if you followed breakin procedure ?????????

 

In spite of your experience with the 10w-60, I would be interested to know what oil was in Heatwave's 4th motor. Was it still Syn3 20w50?

Reason for my curiosity is that at least one factor in most of the sumping bikes seems to be the motor's internal temps (and how long it took to get them there). If those temps are leading to aeration of the oil, and IF the pump is being prevented from getting that oil back for scavenging because of the aeration of it, then something as simple as a different viscosity, or even of the same viscosity but of a different brand or formula, as has been explained elsewhere concerning operating properties, could make a difference in whether or not a particular motor will sump, or possibly when it would sump with all other things being equal. I wonder if Harley is trying something along those lines either with or without additional modifications in some of these builds.

That's what I've come away thinking about after reading most every post in this thread and skimming through those that I didn't read entirely. Wouldn't it be nice if something as simple as changing the oil viscosity and/or formula could lessen the numbers of those that will sump?

 

 

My intention was not to start a debate about oil. Like you I've seen enough of those. It was just a thought, there partly because we all, including you are wondering what they did that was different on your 4th motor. Now that you've told us they used the same Syn3 that answers my question and satisfied my curiosity. And bursts that particular possibility bubble. Thanks for the quick reply. And thank you Heatwave for being responsible for getting so much good information out to all of us that may or may not experience at least part of your travails with the M8.

 

4 engines...……..that's got to be a record? I am dumb founded as to how to even respond to hearing this - tell HD to buy that pile of garbage back & if you want performance go get the Kawasaki h2, no matter what stage you go with - HD will never touch the power & speed of the H2 & clearly you are wanting performance as many of your post state such.

Im just in wonderment as to why anyone after 4 engines would want to chance riding anywhere? clearly this bike has more shop time than road riding time - sorry but not for me! all im hearing about lately is problems with these new bikes - hopefully HD gets this fixed

 

 

No, there are many others with even more, that's the said part of all this. I truly believe they are hoping to get these bike out of warranty and dump it onto the owner and let them worry about it when they know damn good and well it's there issue. Think about it, if there is no problem as they say, why is there new cases to fix what isn't a problem? They should supply each and every M8 owner new cases or a FREE extended warranty to cover this mess for ALL 2017 and 2018 model year owners!

 

 

I have not personally seen any of them but Heatwave claims to have one and so do several others around the country. I have to believe there is something to it, as it's coming back from several different people. IMHO in typical MoCo fashion they will just call it running changes and it has nothing to do with engine sumpping when or if they come out to the general public.

 

Again, if we can get our hands on the FY19 Model Year Technical Forum document after the fall dealer meetings, that will tell us a lot.