M8 owners - Oil consumption? - Road Glide Forums
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post #1 of 31 (permalink) Old 08-12-2018, 09:32 AM Thread Starter
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M8 owners - Oil consumption?

Please only M8 experience replies - other threads on internet forums I saw on this issue deviate quickly from the question. I am very curious to hear facts from you other M8 owners as to are YOU having any Oil consumption issues --- OR --- are you Not seeing this with your M8?

This post is pre-dealer visit as its Sunday and just returned from long trip. This my 4th RG in 20 years, I do ride pretty hard and long trips often but never had a Harley burn oil in all those years till this M8.

My story ......bike is 2018 RG Ultra, had dealer add Stage 2 Cam kit before I drove it home. Had 1000 mile service done. Then multiple day trips and at 1850 miles I checked and fluids were perfect level. Just returned from a 3535 mile trip over 13 days, and consumed 2+ qt. oil & 3.5 oz. trany fluid!!! Rode thru Idaho, Yellowstone then to Deadwood for rally. I never rode it in hot part of day, 55F to 90F riding temps the whole trip. Yea I read all the transfer fluid issues that's why I have been checking trany too.

I "check" oil as per manual, run for 2+ minutes then turn off and check on jiffy stand. Sometimes run bike for 10-15 minute ride before checking.

I checked oil after 1650 mi. (3500 mi. odometer) and was 1 qt. low and added the qt. Added and re-checked next morning and all good. Trany looked just below mid range so left as-is.

Checked oil after ~900 mi. more and was ~1/2 qt. low so added and rechecked cold next morning, all good. Trany looked OK still.

Go home yesterday, checked and clearly 1/2 Qt. low so added it, then checked trany and was way low... added 8 oz. I rechecked both cold just now and ok, but still little low on oil, trany back to good level. .

I am so very happy with this bike, best ever in so many ways, but extremely concerned if and what may be wrong here.
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Last edited by Idaho-Cal RGU; 08-13-2018 at 08:58 AM. Reason: corrected numebrs after measuring volume left in qt. & explained engine oil chekc procedure.
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post #2 of 31 (permalink) Old 08-12-2018, 09:45 AM
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Quote:
Originally Posted by Idaho-Cal RGU View Post
Please only M8 experience replies - other threads on internet forums I saw on this issue deviate quickly from the question. I am very curious to hear facts from you other M8 owners as to are YOU having any Oil consumption issues --- OR --- are you Not seeing this with your M8?
I am so very happy with this bike, best ever in so many ways, but extremely concerned if and what may be wrong here.
sorry for your troubles, man.

i have an '18 FLTRX with 4800 miles and no issues so far. i'm loving this engine.

mfg. date 04/18

definitely take it in for dealer info.

more people will chime in i'm sure.

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post #3 of 31 (permalink) Old 08-12-2018, 11:11 AM
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Had some initial oil leakage before the 1k service. Replaced an o ring. Had some more leakage that my new dealer finally diagnosed as the fact the old dealer overfilled the bike. Started running it mid range and it has been solid since.

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post #4 of 31 (permalink) Old 08-12-2018, 12:13 PM
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I purchased my 2018 FLTRXS in August of 2017. Only 7k miles, but I've had no problems with engine or trany oil.
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post #5 of 31 (permalink) Old 08-12-2018, 01:00 PM
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Sorry to hear. Hopefully they can get it figured out and fixed under warranty.

I have had no issues with my '17 M8 Road King, and no issues with my '18 Road Glide Special.

I don't know about the Harleys, but many of the metric bikes I have owned stated in the owner's manual that it was normal to consume oil with sustained high speed riding.
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post #6 of 31 (permalink) Old 08-12-2018, 01:29 PM
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There is a technical bulletin out, which I have personally read. It says 1QT every 1500 miles is normal.

I am not making this up.

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post #7 of 31 (permalink) Old 08-12-2018, 02:07 PM
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I have a 17 RGS that burned a quart and a half on a 3300 mile ride this summer. We were running through the Nevada desert at 75-80 with ambient temperatures at 95-105. Never really noticed any consumption with all the local day rides. I did just switch to synthetic before the trip. 9700 on the odometer.
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post #8 of 31 (permalink) Old 08-12-2018, 02:21 PM
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I have 18k on mine no issues just returned from Shark Week and that was a 6,921 mile trip and the tranny oil was still on the same mark as when I left...


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post #9 of 31 (permalink) Old 08-12-2018, 03:08 PM
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Your 8 ounces of tranny fluid might be the transfer issue. You didn't mention if you checked the primary to see if it migrated. (Check it)

I did have to add about a quart of oil after about 3k. I also have stage 2 (torque cam). I occasionally get blow by (screamin' eagle ventilator air filter) if I ride hard so I could have lost oil that way.
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post #10 of 31 (permalink) Old 08-12-2018, 03:54 PM
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I added 1.5 qts between 2200-4800 miles. Have not added any in the last 1k miles, currently 5800.


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