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Switching to different Brands of Oil in the Engine & Trans

Started by FloridaJim5, October 04, 2022, 01:25:31 PM

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FloridaJim5

On a 2019 Ultra Milwaukee 8, I decided to change the Engine to Mobil 1 V-twin 20w50 and the Trans to Bel-Ray Big Twin which is 85w140. 

What method should be followed or what do you guys do when switching brands? 

Since the engine oiling system has oil in the lines and cooler, is there a way to flush or purge it out? Or should I just change it a couple of times and call it good? 

With the Trans, since the Bel-Ray trans lube is Red, I think I'll just change it twice and make sure the color is the same as the oil in the bottle (not diluted).   

Do you guys have any recommendations? 


Hossamania

Quote from: FloridaJim5 on October 04, 2022, 01:25:31 PMOn a 2019 Ultra Milwaukee 8, I decided to change the Engine to Mobil 1 V-twin 20w50 and the Trans to Bel-Ray Big Twin which is 85w140. 

What method should be followed or what do you guys do when switching brands? 

Since the engine oiling system has oil in the lines and cooler, is there a way to flush or purge it out? Or should I just change it a couple of times and call it good? 

With the Trans, since the Bel-Ray trans lube is Red, I think I'll just change it twice and make sure the color is the same as the oil in the bottle (not diluted).   

Do you guys have any recommendations? 



Change the fluids as you normally do and don't overthink it.
I've swapped brands many times with no special procedures to clear out the old residue.
If the government gives you everything you want,
it can take away everything you have.

calif phil

Hoss is spot on.  Slippery is all the engine cares about.

calif phil

PS   Bel Ray makes some great products, tranny and primary fluid are great, really like their FULL synthetic 10w50 V Twin engine oil.   

FloridaJim5

Thanks Hoss and Phil. Yeah, I'm sure I'm over-thinking it! I really like Bel-Ray products too and love the Big-Twin trans lube.

Oclaf

As noted elsewhere, the engine don't care so long as it's at the level required. Never been a case where the type of oil was the reason an engine or any machine went sideways.

Hossamania

I like the Bel Ray products too, and use Spectro occasionally as well. I've used just about every type of GL5 equivalent gear lube over the last 28 years, even HD Formula+ (gasp!), Bel Ray is the current winner.
If the government gives you everything you want,
it can take away everything you have.

calif phil

I was a Spectro guy and still love their 6 speed tranny fluid, but they priced themselves into the stratosphere at $25 a quart. 

Finn

Quote from: Hossamania on October 04, 2022, 01:39:59 PMChange the fluids as you normally do and don't overthink it.
That's how I have always done it when switching brands.
-83 GS1000G | -84 GSX1100EF | -97 FLHR | -98 FLSTS | -16 Triumph Tiger Explorer XRT 1200

les

If the syn oil is synthesized from a petroleum base, then you'll have no problem mixing them.  The last time there was a "clean out" issue was the engine oil auto inject tank on my two-stroke mini-enduro.

If you mixed a petroleum base oil with Klotz, it would do just as the oil's name suggests.  That was over 50 years ago...

GaryD

As Hoss said.
I've been using Amsoil 20-50 and 90-140 gear oil for the last 25+ years, but now that I've retired and am on a budget, I buy any bra :up: nd name syn oil that's on sale.  :SM:
AMA Life Mbr.
USMC VietNam 66-67 3rd Tnk. Bat