Milwaukee Eight (M8) 2017 and up M8 Air and Liquid Cooled discussion
Sponsored by:
Sponsored by:

Oil Level weirdness

Thread Tools
 
Search this Thread
 
Old Jul 21, 2017 | 10:36 PM
  #21  
BLKDLX's Avatar
BLKDLX
Cruiser
Joined: Jun 2017
Posts: 211
Likes: 40
From: Bible Belt
Default

Originally Posted by Beerbar
Finally got some news on this. The dealer spent all week riding around in the heat to see if they can reproduce my problem. I went to pick it up because they didnt have enough time to put more miles on which is understandable. Ill rode it and monitor. As I went to the bay, the mechanic said give me a few more minutes to check something. He had just got back from a ride on it. He pulled off the primary cover and the oil over flowed out. He said, I think I found your missing oil problem.

They did a oil change on Saturday to make sure the levels were correct and said I had only 3.5 quarts in there. Now, before I rode the 20 miles to drop it off, it was over full.

Have an HD reference number, got a loaner (RG Ultra) and now have to wait for HD to tell the shop how to fix this so called impossible problem.
that sucks, welcome to the growing club. I'm so glad I held off on buying one of these M8 motors.
 
Reply
Old Jul 22, 2017 | 10:23 AM
  #22  
BrandonSmith's Avatar
BrandonSmith
HDF Community Team
5 Year Member
Active Streak: 30 Days
Community Favorite
Top Answer: 5
Joined: Mar 2017
Posts: 7,883
Likes: 4,443
From: Texas
Default

Hmm... Oil into the primary is different than the seemingly increasing number of transmission to primary issues... This is a new one.
 
Reply
Old Jul 23, 2017 | 10:19 AM
  #23  
paullavery's Avatar
paullavery
Road Master
Joined: Jul 2009
Posts: 900
Likes: 111
From: surrey, england
Default

I've just had to add 1 quart to get the levels good when checking level when hot, upto the 1K service i didn't have to add anything & since the oil change its used a quart in 1300 miles, not sure if that is normal ??
 
Reply
Old Jul 23, 2017 | 10:46 AM
  #24  
mjwebb's Avatar
mjwebb
Seasoned HDF Member
15 Year Member
Photogenic
Community Builder
Top Answer: 1
Joined: Jan 2008
Posts: 13,676
Likes: 11,468
From: State of Confusion
Default

Originally Posted by paullavery
I've just had to add 1 quart to get the levels good when checking level when hot, upto the 1K service i didn't have to add anything & since the oil change its used a quart in 1300 miles, not sure if that is normal ??
yikes! Harley may say that falls within 'normal' but nothing I've ever experienced..wife's Freewheeler is pretty thirsty tho, not quite that bad
 
Reply
Old Jul 23, 2017 | 11:04 AM
  #25  
paullavery's Avatar
paullavery
Road Master
Joined: Jul 2009
Posts: 900
Likes: 111
From: surrey, england
Default

Originally Posted by mjwebb
yikes! Harley may say that falls within 'normal' but nothing I've ever experienced..wife's Freewheeler is pretty thirsty tho, not quite that bad
I know, this is my 6th harley over the years & never had oil consumption like it ! I'll be even more paranoid now, i get on very well with the supplying dealership so will be having a word next time I'm in there.
 
Reply
Old Jul 23, 2017 | 12:09 PM
  #26  
rjjj629's Avatar
rjjj629
Road Warrior
Joined: Jul 2015
Posts: 1,512
Likes: 345
From: Ohio
Default

Originally Posted by paullavery
I know, this is my 6th harley over the years & never had oil consumption like it ! I'll be even more paranoid now, i get on very well with the supplying dealership so will be having a word next time I'm in there.
My SGS eats more oil than previous ones did but yours sounds worse than mine. I'm just over 14K miles now and I've been pretty consistently having to add 1 qt every 4,000 miles.

It bothers me, but at least its consistent
 
Reply
Old Jul 24, 2017 | 07:03 AM
  #27  
Heatwave's Avatar
Heatwave
Member
Joined: Jul 2009
Posts: 4,310
Likes: 1,079
Default

Before you add more oil because tthe dipstick is low, ask your dealer to pull the Crank Position Sensor under the crankcase. If more than 3 oz flows out, you have a serious engine issue. Read SB 1450. I believe it applies to more than just M8 engines with stage 3 or 4 kits.
 
Reply
Old Aug 1, 2017 | 08:28 AM
  #28  
Beerbar's Avatar
Beerbar
Thread Starter
|
Cruiser
Joined: Sep 2016
Posts: 148
Likes: 38
From: Freehold NJ
Default

Originally Posted by paullavery
I've just had to add 1 quart to get the levels good when checking level when hot, upto the 1K service i didn't have to add anything & since the oil change its used a quart in 1300 miles, not sure if that is normal ??
This is exactly how mine started and exactly the mileage. Pull off the primary cover and check your level in there, check your transmission as well. From what I was told the seals are bad and have been redesigned a few times already.

I'll have more information hopefully this week I hope, going on week 3.
 
Reply
HD Forum Stories

The Best of Harley-Davidson for Lifelong Riders

story-0

7 Times Harley-Davidson Chucked Tradition Out the Window

 Verdad Gallardo
story-1

7 Surprising Harley-Davidson Products that Are Not Motorcycles

 Verdad Gallardo
story-2

8 Best Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-3

10 Worst Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-4

Killer Custom's Jail Break Is The Breakout That Refused to Blend In

 Verdad Gallardo
story-5

Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

 Verdad Gallardo
story-6

Harley-Davidson Reveals Super Cool Cafe Racer Concept

 Verdad Gallardo
story-7

Engraved Rebellion: Inside Bundnerbike's Glam Rock II

 Verdad Gallardo
story-8

10 Motorcycles You Should Never Buy

 Joe Kucinski
story-9

10 Things Harley-Davidson Needs to Fix in 2026

 Verdad Gallardo
Old Aug 1, 2017 | 02:06 PM
  #29  
paullavery's Avatar
paullavery
Road Master
Joined: Jul 2009
Posts: 900
Likes: 111
From: surrey, england
Default

Originally Posted by Beerbar
This is exactly how mine started and exactly the mileage. Pull off the primary cover and check your level in there, check your transmission as well. From what I was told the seals are bad and have been redesigned a few times already.

I'll have more information hopefully this week I hope, going on week 3.
Primary & transmission levels are good, I spoke to the service manager the other day about this & he agreed with me that the consumption was excessive, asked me to run it another 500 miles & check level & if its still consuming at this rate to bring it in for them to investigate further. So far I've only managed a couple of hundred miles & its sitting at 1 square below the F mark.
 
Reply
Old Aug 1, 2017 | 03:15 PM
  #30  
Beerbar's Avatar
Beerbar
Thread Starter
|
Cruiser
Joined: Sep 2016
Posts: 148
Likes: 38
From: Freehold NJ
Default

Originally Posted by paullavery
Primary & transmission levels are good, I spoke to the service manager the other day about this & he agreed with me that the consumption was excessive, asked me to run it another 500 miles & check level & if its still consuming at this rate to bring it in for them to investigate further. So far I've only managed a couple of hundred miles & its sitting at 1 square below the F mark.
After adding the quart? seems very similar, after I added the quart it stayed steady. If you start it cold and let it idle for 5 - 10 minutes whats the dip stick say then? This is when I knew I had a problem, all of a sudden I had to much oil. My primary would also get hot and it would be hard to shift gears, neutral would be very hard to find. The tech said probably because there was way to much oil in the primary from the leak.
 
Reply



All times are GMT -5. The time now is 10:40 PM.

story-0
7 Times Harley-Davidson Chucked Tradition Out the Window

Slideshow: Harley-Davidson built its reputation on nostalgia, but every so often, the company took a hard left turn into the future.

By Verdad Gallardo | 2026-05-20 11:18:19


VIEW MORE
story-1
7 Surprising Harley-Davidson Products that Are Not Motorcycles

Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.

By Verdad Gallardo | 2026-04-29 16:50:35


VIEW MORE
story-2
8 Best Harley-Davidson Motorcycles Ever

Slideshow: Not every Harley gets it right, but these are the ones that genuinely earned their reputation.

By Pouria Savadkouei | 2026-04-15 14:23:21


VIEW MORE
story-3
10 Worst Harley-Davidson Motorcycles Ever

Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.

By Pouria Savadkouei | 2026-04-01 20:01:09


VIEW MORE
story-4
Killer Custom's Jail Break Is The Breakout That Refused to Blend In

Slideshow: Killer Custom's "Jail Breaker" build focuses more on stance and visual aggression than mechanical overhaul.

By Verdad Gallardo | 2026-03-18 19:20:32


VIEW MORE
story-5
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.

By Verdad Gallardo | 2026-03-07 16:15:30


VIEW MORE
story-6
Harley-Davidson Reveals Super Cool Cafe Racer Concept

Slideshow: Harley-Davidson's new RMCR concept revives the café racer formula with modern hardware-and it may be exactly the reset the company needs.

By Verdad Gallardo | 2026-03-04 12:23:37


VIEW MORE
story-7
Engraved Rebellion: Inside Bundnerbike's Glam Rock II

Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.

By Verdad Gallardo | 2026-02-24 18:19:44


VIEW MORE
story-8
10 Motorcycles You Should Never Buy

Slideshow: There is no shortage of great motorcycles to buy, but we would avoid these ten.

By Joe Kucinski | 2026-02-19 14:50:51


VIEW MORE
story-9
10 Things Harley-Davidson Needs to Fix in 2026

Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.

By Verdad Gallardo | 2026-01-13 18:33:17


VIEW MORE