- Dec 7, 2020
- Reaction score
- Minneapolis, MN
- Ram Year
- 2017 2500 Laramie Crew Cab
- 6.4L HEMI
Off the topic a bit but What year is your Harley? I have a 2021 Road glide with the M8, it rattles a bit on cold starts then quiets down. Currently using Mobil 1 V Twin but thinking on trying Redline 20-50 once to see if it runs quieter or have heard some say that adding some Lube Gard Biotech will quiet them down also.
Well, it is the Synthetic Oil Thread, and lubrication is lubrication, so......
I bought new 2021 Softail Heritage Classic with M8 107 engine. Mine never did just clank at startup - it clanked all the time! So did gear shifts.
I'd suggest Mobil 1 V Twin + Lubegard will be close to Red Line. Since we're supposed to change engine oil annually regardless of mileage (I don't approach maximum 5k mileage for OCI), I'd say choosing either would be a good choice.
As important is changing the transmission and chain case lube. Definitely go Red Line there, since these are drive boxes that don't get contaminated by combustion blowby, therefore the OCI's are much longer. And they don't take nearly the amount of oil the engine does. There are two different oils for these boxes - RL Chaincase Oil and RL Shockproof Gear Oil. You'll be amazed how these lubes quiet down the clanking. Which means they lubricate much better.